Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Runtime/Hosting/DbResourceAllocator.cs

@@ -0,0 +1,380 @@
+//------------------------------------------------------------------------------
+// <copyright file="DbResourceAllocator.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Collections.Specialized;
+using System.Configuration;
+using System.Data;
+using System.Data.Common;
+using System.Data.OleDb;
+using System.Data.SqlClient;
+using System.Diagnostics;
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Transactions;
+using System.Threading;
+
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary>
+    /// Local database providers we support
+    /// </summary>
+    internal enum Provider
+    {
+        SqlClient = 0,
+        OleDB = 1
+    }
+
+    /// <summary>
+    /// Internal Database access abstraction to 
+    /// - abstract the derived Out-of-box SharedConnectionInfo from all DB hosting services
+    /// - provide uniform connection string management
+    /// - and support different database providers 
+    /// </summary>
+    internal sealed class DbResourceAllocator
+    {
+        const string EnlistFalseToken = ";Enlist=false";
+        internal const string ConnectionStringToken = "ConnectionString";
+
+        string connString;
+        Provider localProvider;
+
+        /// <summary>
+        /// Initialize the object by getting the connection string from the parameter or 
+        /// out of the configuration settings
+        /// </summary>
+        /// <param name="runtime"></param>
+        /// <param name="parameters"></param>
+        /// <param name="connectionString"></param>
+        internal DbResourceAllocator(
+            WorkflowRuntime runtime,
+            NameValueCollection parameters,
+            string connectionString)
+        {
+            // If connection string not specified in input, search the config sections
+            if (String.IsNullOrEmpty(connectionString))
+            {
+                if (parameters != null)
+                {
+                    // First search in this service's parameters
+                    foreach (string key in parameters.AllKeys)
+                    {
+                        if (string.Compare(ConnectionStringToken, key, StringComparison.OrdinalIgnoreCase) == 0)
+                        {
+                            connectionString = parameters[ConnectionStringToken];
+                            break;
+                        }
+                    }
+                }
+                if (String.IsNullOrEmpty(connectionString) && (runtime != null))
+                {
+                    NameValueConfigurationCollection commonConfigurationParameters = runtime.CommonParameters;
+                    if (commonConfigurationParameters != null)
+                    {
+                        // Then scan for connection string in the common configuration parameters section
+                        foreach (string key in commonConfigurationParameters.AllKeys)
+                        {
+                            if (string.Compare(ConnectionStringToken, key, StringComparison.OrdinalIgnoreCase) == 0)
+                            {
+                                connectionString = commonConfigurationParameters[ConnectionStringToken].Value;
+                                break;
+                            }
+                        }
+                    }
+                }
+
+                // If no connectionString parsed out of the params, inner layer throws 
+                //   System.ArgumentNullException: Connection string cannot be null or empty
+                //   Parameter name: connectionString
+                // But this API caller does not have connectionString param.
+                // So throw ArgumentException with the original message.
+                if (String.IsNullOrEmpty(connectionString))
+                    throw new ArgumentNullException(ConnectionStringToken, ExecutionStringManager.MissingConnectionString);
+            }
+
+            Init(connectionString);
+        }
+
+        #region Accessors
+
+        internal string ConnectionString
+        {
+            get { return this.connString; }
+        }
+
+        #endregion Accessors
+
+
+        #region Internal Methods
+        /// <summary>
+        /// Disallow the hosting service to have different connection string if using SharedConnectionWorkflowTransactionService
+        /// Should be called after all hosting services are added to the WorkflowRuntime
+        /// </summary>
+        /// <param name="transactionService"></param>
+        internal void DetectSharedConnectionConflict(WorkflowCommitWorkBatchService transactionService)
+        {
+            SharedConnectionWorkflowCommitWorkBatchService sharedConnectionTransactionService = transactionService as SharedConnectionWorkflowCommitWorkBatchService;
+            if (sharedConnectionTransactionService != null)
+            {
+                if (String.Compare(sharedConnectionTransactionService.ConnectionString, this.connString, StringComparison.Ordinal) != 0)
+                    throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
+                        ExecutionStringManager.SharedConnectionStringSpecificationConflict, this.connString, sharedConnectionTransactionService.ConnectionString));
+            }
+
+        }
+
+        #region Get a connection
+
+        internal DbConnection OpenNewConnection()
+        {
+            // Always disallow AutoEnlist since we enlist explicitly when necessary
+            return OpenNewConnection(true);
+        }
+
+        internal DbConnection OpenNewConnectionNoEnlist()
+        {
+            return OpenNewConnection(true);
+        }
+
+        internal DbConnection OpenNewConnection(bool disallowEnlist)
+        {
+            DbConnection connection = null;
+            string connectionStr = this.connString;
+
+            if (disallowEnlist)
+                connectionStr += DbResourceAllocator.EnlistFalseToken;
+
+            if (this.localProvider == Provider.SqlClient)
+                connection = new SqlConnection(connectionStr);
+            else
+                connection = new OleDbConnection(connectionStr);
+
+            connection.Open();
+
+            return connection;
+        }
+
+        /// <summary>
+        /// Gets a connection enlisted to the transaction.  
+        /// If the transaction already has a connection attached to it, we return that,
+        /// otherwise we create a new connection and enlist to the transaction
+        /// </summary>
+        /// <param name="transaction"></param>
+        /// <param name="isNewConnection">output if we created a connection</param>
+        /// <returns></returns>
+        internal DbConnection GetEnlistedConnection(WorkflowCommitWorkBatchService txSvc, Transaction transaction, out bool isNewConnection)
+        {
+            DbConnection connection;
+            SharedConnectionInfo connectionInfo = GetConnectionInfo(txSvc, transaction);
+
+            if (connectionInfo != null)
+            {
+                connection = connectionInfo.DBConnection;
+                Debug.Assert((connection != null), "null connection");
+                Debug.Assert((connection.State == System.Data.ConnectionState.Open),
+                    "Invalid connection state " + connection.State + " for connection " + connection);
+
+                isNewConnection = false;
+            }
+            else
+            {
+                connection = this.OpenNewConnection();
+                connection.EnlistTransaction(transaction);
+
+                isNewConnection = true;
+            }
+
+            return connection;
+        }
+
+        #endregion Get a connection
+
+        #region Get Local Transaction
+
+        internal static DbTransaction GetLocalTransaction(WorkflowCommitWorkBatchService txSvc, Transaction transaction)
+        {
+            DbTransaction localTransaction = null;
+            SharedConnectionInfo connectionInfo = GetConnectionInfo(txSvc, transaction);
+
+            if (connectionInfo != null)
+                localTransaction = connectionInfo.DBTransaction;
+
+            return localTransaction;
+        }
+
+        #endregion Get Local Transaction
+
+        #region Get a command object for querying
+
+        internal DbCommand NewCommand()
+        {
+            DbConnection dbConnection = OpenNewConnection();
+            return DbResourceAllocator.NewCommand(dbConnection);
+        }
+
+        internal static DbCommand NewCommand(DbConnection dbConnection)
+        {
+            return NewCommand(null, dbConnection, null);
+        }
+        internal static DbCommand NewCommand(string commandText, DbConnection dbConnection, DbTransaction transaction)
+        {
+            DbCommand command = dbConnection.CreateCommand();
+            command.CommandText = commandText;
+            command.Transaction = transaction;
+
+            return command;
+        }
+
+        #endregion Get a command object for querying
+
+        #region build a command parameter object for a stored procedure
+
+        internal DbParameter NewDbParameter()
+        {
+            return NewDbParameter(null, null);
+        }
+
+        internal DbParameter NewDbParameter(string parameterName, DbType type)
+        {
+            if (this.localProvider == Provider.SqlClient)
+            {
+                if (type == DbType.Int64)
+                    return new SqlParameter(parameterName, SqlDbType.BigInt);
+                else
+                    return new SqlParameter(parameterName, type);
+            }
+            else
+            {
+
+                if (type == DbType.Int64)
+                    return new OleDbParameter(parameterName, OleDbType.BigInt);
+                else
+                    return new OleDbParameter(parameterName, type);
+            }
+        }
+
+        internal DbParameter NewDbParameter(string parameterName, DbType type, ParameterDirection direction)
+        {
+            DbParameter parameter = NewDbParameter(parameterName, type);
+            parameter.Direction = direction;
+
+            return parameter;
+        }
+
+        internal DbParameter NewDbParameter(string parameterName, object value)
+        {
+            if (this.localProvider == Provider.SqlClient)
+                return new SqlParameter(parameterName, value);
+            else
+                return new OleDbParameter(parameterName, value);
+        }
+
+        #endregion build a command parameter object for a stored procedure
+
+        #endregion Public Methods
+
+
+        #region Private Helpers
+
+        private void Init(string connectionStr)
+        {
+            SetConnectionString(connectionStr);
+
+            try
+            {
+                // Open a connection to see if it's a valid connection string
+                using (DbConnection connection = this.OpenNewConnection(false))
+                {
+                }
+            }
+            catch (Exception e)
+            {
+                throw new ArgumentException(ExecutionStringManager.InvalidDbConnection, "connectionString", e);
+            }
+
+            // OLEDB connection pooling causes this exception in ExecuteInsertWorkflowInstance
+            // "Cannot start more transactions on this session."
+            // Disable pooling to avoid dirty connections.
+            if (this.localProvider == Provider.OleDB)
+                this.connString = String.Concat(this.connString, ";OLE DB Services=-4");
+        }
+
+        private void SetConnectionString(string connectionString)
+        {
+            if (String.IsNullOrEmpty(connectionString) || String.IsNullOrEmpty(connectionString.Trim()))
+                throw new ArgumentNullException("connectionString", ExecutionStringManager.MissingConnectionString);
+
+            DbConnectionStringBuilder dcsb = new DbConnectionStringBuilder();
+            dcsb.ConnectionString = connectionString;
+
+            // Don't allow the client to specify an auto-enlist value since we decide whether to participate in a transaction
+            // (enlist for writing and not for reading).
+            if (dcsb.ContainsKey("enlist"))
+            {
+                throw new ArgumentException(ExecutionStringManager.InvalidEnlist);
+            }
+
+            this.connString = connectionString;
+            //
+            // We only support sqlclient, sql is the only data store our OOB services talk to.
+            localProvider = Provider.SqlClient;
+        }
+        /*
+        private void SetLocalProvider(string connectionString)
+        {
+            // Assume caller already validated the connection string
+            MatchCollection providers = Regex.Matches(connectionString, @"(^|;)\s*provider\s*=[^;$]*(;|$)", RegexOptions.IgnoreCase);
+
+            // Cannot use DbConnectionStringBuilder because it selects the last provider, not the first one, by itself.
+            // A legal Sql connection string allows for multiple provider specification and 
+            // selects the first provider
+            if (providers.Count > 0)
+            {
+                // Check if the first one matches "sqloledb" or "sqloledb.<digit>"
+                if (Regex.IsMatch(providers[0].Value, @"provider\s*=\s*sqloledb(\.\d+)?\s*(;|$)", RegexOptions.IgnoreCase))
+                {
+                    this.localProvider = Provider.OleDB;
+                }
+                else
+                {
+                    // We don't support other providers
+                    throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,ExecutionStringManager.UnsupportedSqlProvider, providers[0].Value));
+                }
+            }
+            else
+            {
+                // SqlClient provider requires no provider keyword specified in connection string
+                this.localProvider = Provider.SqlClient;
+            }
+        }
+        */
+
+        private static SharedConnectionInfo GetConnectionInfo(WorkflowCommitWorkBatchService txSvc, Transaction transaction)
+        {
+            SharedConnectionInfo connectionInfo = null;
+
+            SharedConnectionWorkflowCommitWorkBatchService scTxSvc = txSvc as SharedConnectionWorkflowCommitWorkBatchService;
+            if (scTxSvc != null)
+            {
+                connectionInfo = scTxSvc.GetConnectionInfo(transaction);
+
+                // The transaction service can't find entry if the transaction has been completed.
+                // be sure to propate the error so durable services can cast to appropriate exception
+                if (connectionInfo == null)
+                    throw new ArgumentException(
+                        String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.InvalidTransaction));
+            }
+            return connectionInfo;
+        }
+
+        #endregion Private Helpers
+    }
+
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/DefaultWorkflowLoaderService.cs

@@ -0,0 +1,87 @@
+#region Imports
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Xml;
+using System.Text;
+using System.IO;
+using System.ComponentModel.Design;
+using System.ComponentModel.Design.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.ComponentModel.Compiler;
+using System.Workflow.ComponentModel.Serialization;
+using System.Workflow.ComponentModel.Design;
+using System.Workflow.Runtime;
+
+#endregion
+
+
+namespace System.Workflow.Runtime.Hosting
+{
+
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class DefaultWorkflowLoaderService : WorkflowLoaderService
+    {
+        protected internal override Activity CreateInstance(Type workflowType)
+        {
+            if (workflowType == null)
+                throw new ArgumentNullException("workflowType");
+            
+            if (!typeof(Activity).IsAssignableFrom(workflowType))
+                throw new ArgumentException(ExecutionStringManager.TypeMustImplementRootActivity);
+
+            if (workflowType.GetConstructor(System.Type.EmptyTypes) == null)
+                throw new ArgumentException(ExecutionStringManager.TypeMustHavePublicDefaultConstructor);
+
+            return Activator.CreateInstance(workflowType) as Activity;
+        }
+        
+        // This function will create a new root activity definition tree by deserializing the xoml and the rules file.
+        protected internal override Activity CreateInstance(XmlReader workflowDefinitionReader, XmlReader rulesReader)
+        {
+            if (workflowDefinitionReader == null)
+                throw new ArgumentNullException("workflowDefinitionReader");
+
+            Activity root = null;
+            ValidationErrorCollection errors = new ValidationErrorCollection();
+            ServiceContainer serviceContainer = new ServiceContainer();
+            ITypeProvider typeProvider = this.Runtime.GetService<ITypeProvider>();
+            if (typeProvider != null)
+                serviceContainer.AddService(typeof(ITypeProvider), typeProvider);
+
+            DesignerSerializationManager manager = new DesignerSerializationManager(serviceContainer);
+            try
+            {
+                using (manager.CreateSession())
+                {
+                    WorkflowMarkupSerializationManager xomlSerializationManager = new WorkflowMarkupSerializationManager(manager);
+                    root = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, workflowDefinitionReader) as Activity;
+                    if (root != null && rulesReader != null)
+                    {
+                        object rules = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, rulesReader);
+                        root.SetValue(ConditionTypeConverter.DeclarativeConditionDynamicProp, rules);
+                    }
+
+                    foreach (object error in manager.Errors)
+                    {
+                        if (error is WorkflowMarkupSerializationException)
+                            errors.Add(new ValidationError(((WorkflowMarkupSerializationException)error).Message, ErrorNumbers.Error_SerializationError));
+                        else
+                            errors.Add(new ValidationError(error.ToString(), ErrorNumbers.Error_SerializationError));
+                    }
+                }
+            }
+            catch (Exception e)
+            {
+                errors.Add(new ValidationError(e.Message, ErrorNumbers.Error_SerializationError));
+            }
+
+            if (errors.HasErrors)
+                throw new WorkflowValidationFailedException(ExecutionStringManager.WorkflowValidationFailure, errors);
+
+            return root;
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/DefaultWorkflowSchedulerService.cs

@@ -0,0 +1,386 @@
+using System;
+using System.Collections;
+using System.Collections.ObjectModel;
+using System.Collections.Generic;
+using System.Threading;
+using System.Collections.Specialized;
+using System.Diagnostics;
+using System.Workflow.Runtime;
+using System.Globalization;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class DefaultWorkflowSchedulerService : WorkflowSchedulerService
+    {
+        // next two fields controlled by locking the timerQueue
+        private KeyedPriorityQueue<Guid, CallbackInfo, DateTime> timerQueue = new KeyedPriorityQueue<Guid, CallbackInfo, DateTime>();
+        private Timer callbackTimer;
+
+        private TimerCallback timerCallback;
+        private const string MAX_SIMULTANEOUS_WORKFLOWS_KEY = "maxSimultaneousWorkflows";
+        private const int DEFAULT_MAX_SIMULTANEOUS_WORKFLOWS = 5;
+        private static TimeSpan infinite = new TimeSpan(Timeout.Infinite);
+        private readonly int maxSimultaneousWorkflows;       // Maximum number of work items allowed in ThreadPool queue
+        private static TimeSpan fiveMinutes = new TimeSpan(0, 5, 0);
+
+        // next three fields controlled by locking the waitingQueue
+        private int numCurrentWorkers;
+        private Queue<WorkItem> waitingQueue;       // Queue for extra items waiting to be allowed into thread pool
+        private volatile bool running = false;
+
+        private IList<PerformanceCounter> queueCounters;    // expose internal queue length
+
+        private static int DefaultThreadCount
+        {
+            get
+            {
+                return Environment.ProcessorCount == 1
+                    ? DEFAULT_MAX_SIMULTANEOUS_WORKFLOWS
+                    : (int)(DEFAULT_MAX_SIMULTANEOUS_WORKFLOWS * Environment.ProcessorCount * .8);
+            }
+        }
+
+        public DefaultWorkflowSchedulerService()
+            : this(DefaultThreadCount)
+        {
+        }
+
+
+        public DefaultWorkflowSchedulerService(int maxSimultaneousWorkflows)
+            : base()
+        {
+            if (maxSimultaneousWorkflows < 1)
+                throw new ArgumentOutOfRangeException(MAX_SIMULTANEOUS_WORKFLOWS_KEY, maxSimultaneousWorkflows, String.Empty);
+            this.maxSimultaneousWorkflows = maxSimultaneousWorkflows;
+            init();
+        }
+
+        public DefaultWorkflowSchedulerService(NameValueCollection parameters)
+            : base()
+        {
+            if (parameters == null)
+                throw new ArgumentNullException("parameters");
+
+            maxSimultaneousWorkflows = DefaultThreadCount;
+            foreach (string key in parameters.Keys)
+            {
+                if (key == null)
+                    throw new ArgumentException(String.Format(Thread.CurrentThread.CurrentCulture, ExecutionStringManager.UnknownConfigurationParameter, "null"));
+                string p = parameters[key];
+                if (!key.Equals(MAX_SIMULTANEOUS_WORKFLOWS_KEY, StringComparison.OrdinalIgnoreCase))
+                    throw new ArgumentException(String.Format(Thread.CurrentThread.CurrentCulture, ExecutionStringManager.UnknownConfigurationParameter, key));
+                if (!int.TryParse(p, System.Globalization.NumberStyles.Integer, System.Globalization.CultureInfo.CurrentCulture, out maxSimultaneousWorkflows))
+                    throw new FormatException(MAX_SIMULTANEOUS_WORKFLOWS_KEY);
+            }
+
+            if (maxSimultaneousWorkflows < 1)
+                throw new ArgumentOutOfRangeException(MAX_SIMULTANEOUS_WORKFLOWS_KEY, maxSimultaneousWorkflows, String.Empty);
+
+            init();
+        }
+
+        private void init()
+        {
+            timerCallback = new TimerCallback(OnTimerCallback);
+            timerQueue.FirstElementChanged += OnFirstElementChanged;
+            waitingQueue = new Queue<WorkItem>();
+        }
+
+
+        public int MaxSimultaneousWorkflows
+        {
+            get { return maxSimultaneousWorkflows; }
+        }
+
+        internal protected override void Schedule(WaitCallback callback, Guid workflowInstanceId)
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Scheduling work for instance {0}", workflowInstanceId);
+
+            if (callback == null)
+                throw new ArgumentNullException("callback");
+            if (workflowInstanceId == Guid.Empty)
+                throw new ArgumentException(String.Format(CultureInfo.CurrentUICulture, ExecutionStringManager.CantBeEmptyGuid, "workflowInstanceId"));
+
+            // Add the work item to our internal queue and signal the ProcessQueue thread
+            EnqueueWorkItem(new WorkItem(callback, workflowInstanceId));
+        }
+
+        internal protected override void Schedule(WaitCallback callback, Guid workflowInstanceId, DateTime whenUtc, Guid timerId)
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Scheduling work for instance {0} on timer ID {1} in {2}", workflowInstanceId, timerId, (whenUtc - DateTime.UtcNow));
+
+            if (callback == null)
+                throw new ArgumentNullException("callback");
+            if (timerId == Guid.Empty)
+                throw new ArgumentException(String.Format(CultureInfo.CurrentUICulture, ExecutionStringManager.CantBeEmptyGuid, "timerId"));
+            if (workflowInstanceId == Guid.Empty)
+                throw new ArgumentException(String.Format(CultureInfo.CurrentUICulture, ExecutionStringManager.CantBeEmptyGuid, "workflowInstanceId"));
+
+            CallbackInfo ci = new CallbackInfo(this, callback, workflowInstanceId, whenUtc);
+
+            lock (timerQueue)
+            {
+                timerQueue.Enqueue(timerId, ci, whenUtc);
+            }
+        }
+
+        internal protected override void Cancel(Guid timerId)
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Cancelling work with timer ID {0}", timerId);
+
+            if (timerId == Guid.Empty)
+                throw new ArgumentException(String.Format(CultureInfo.CurrentUICulture, ExecutionStringManager.CantBeEmptyGuid, "timerId"), "timerId");
+
+            lock (timerQueue)
+            {
+                timerQueue.Remove(timerId);
+            }
+        }
+
+        override protected void OnStarted()
+        {
+            lock (timerQueue)
+            {
+                base.OnStarted();
+                CallbackInfo ci = timerQueue.Peek();
+                if (ci != null)
+                    callbackTimer = CreateTimerCallback(ci);
+                running = true;
+            }
+            lock (waitingQueue)
+            {
+                int nToStart = Math.Min(maxSimultaneousWorkflows, waitingQueue.Count);
+                for (int i = 0; i < nToStart; i++)
+                {
+                    if (ThreadPool.QueueUserWorkItem(QueueWorkerProcess))
+                    {
+                        numCurrentWorkers++;
+                    }
+                }
+            }
+            if (queueCounters == null && this.Runtime.PerformanceCounterManager != null)
+            {
+                queueCounters = this.Runtime.PerformanceCounterManager.CreateCounters(ExecutionStringManager.PerformanceCounterWorkflowsWaitingName);
+            }
+        }
+
+        protected internal override void Stop()
+        {
+            lock (timerQueue)
+            {
+                base.Stop();
+                if (callbackTimer != null)
+                {
+                    callbackTimer.Dispose();
+                    callbackTimer = null;
+                }
+                running = false;
+            }
+            lock (waitingQueue)
+            {
+                while (numCurrentWorkers > 0)
+                {
+                    Monitor.Wait(waitingQueue);
+                }
+            }
+        }
+
+        private void OnFirstElementChanged(object source, KeyedPriorityQueueHeadChangedEventArgs<CallbackInfo> e)
+        {
+            // timerQueue must have been locked by operation that caused this event to fire
+
+            if (callbackTimer != null)
+            {
+                callbackTimer.Dispose();
+                callbackTimer = null;
+            }
+            if (e.NewFirstElement != null && this.State == WorkflowRuntimeServiceState.Started)
+            {
+                callbackTimer = CreateTimerCallback(e.NewFirstElement);
+            }
+        }
+
+        private void OnTimerCallback(object ignored)
+        {
+            //Make sure activity ID comes out of Threadpool are initialized to null.
+            Trace.CorrelationManager.ActivityId = Guid.Empty;
+
+            CallbackInfo ci = null;
+            bool fire = false;
+            try
+            {
+                lock (timerQueue)
+                {
+                    if (State == WorkflowRuntimeServiceState.Started)
+                    {
+                        ci = timerQueue.Peek();
+                        if (ci != null)
+                        {
+                            if (ci.IsExpired)
+                            {
+                                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Timeout occured for timer for instance {0}", ci.State);
+                                timerQueue.Dequeue();
+                                fire = true;
+                            }
+                            else
+                            {
+                                callbackTimer = CreateTimerCallback(ci);
+                            }
+                        }
+                    }
+                }
+                if (fire && ci != null)
+                    ci.Callback(ci.State);
+            }
+            // Ignore cases where the workflow has been stolen out from under us
+            catch (WorkflowOwnershipException)
+            { }
+            catch (ThreadAbortException e)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "Timeout for instance, {0} threw exception {1}", ci == null ? null : ci.State, e.Message);
+                RaiseServicesExceptionNotHandledEvent(e, (Guid)ci.State);
+                throw;
+            }
+            catch (Exception e)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "Timeout for instance, {0} threw exception {1}", ci == null ? null : ci.State, e.Message);
+                RaiseServicesExceptionNotHandledEvent(e, (Guid)ci.State);
+            }
+        }
+
+        private Timer CreateTimerCallback(CallbackInfo info)
+        {
+            DateTime now = DateTime.UtcNow;
+            TimeSpan span = (info.When > now) ? info.When - now : TimeSpan.Zero;
+            if (span > fiveMinutes) // never let more than five minutes go by without checking
+                span = fiveMinutes;
+            return new Timer(timerCallback, info.State, span, infinite);
+        }
+
+        private void EnqueueWorkItem(WorkItem workItem)
+        {
+            lock (waitingQueue)
+            {
+                waitingQueue.Enqueue(workItem);
+                if (running && numCurrentWorkers < maxSimultaneousWorkflows)
+                {
+                    if (ThreadPool.QueueUserWorkItem(this.QueueWorkerProcess))
+                    {
+                        numCurrentWorkers++;
+                    }
+                }
+            }
+            if (queueCounters != null)
+            {
+                foreach (PerformanceCounter p in queueCounters)
+                {
+                    p.RawValue = waitingQueue.Count;
+                }
+            }
+        }
+
+        private void QueueWorkerProcess(object state /*unused*/)
+        {
+            //Make sure activity ID comes out of Threadpool are initialized to null.
+            Trace.CorrelationManager.ActivityId = Guid.Empty;
+
+            while (true)
+            {
+                WorkItem workItem;
+                lock (waitingQueue)
+                {
+                    if (waitingQueue.Count == 0 || !running)
+                    {
+                        numCurrentWorkers--;
+                        Monitor.Pulse(waitingQueue);
+                        return;
+                    }
+                    workItem = waitingQueue.Dequeue();
+                }
+                if (queueCounters != null)
+                {
+                    foreach (PerformanceCounter p in queueCounters)
+                    {
+                        p.RawValue = waitingQueue.Count;
+                    }
+                }
+                workItem.Invoke(this);
+            }
+        }
+
+
+        internal class WorkItem
+        {
+            private WaitCallback callback;
+            private object state;
+
+            public WorkItem(WaitCallback callback, object state)
+            {
+                this.callback = callback;
+                this.state = state;
+            }
+
+            public WaitCallback Callback
+            {
+                get { return callback; }
+            }
+
+            public void Invoke(WorkflowSchedulerService service)
+            {
+                try
+                {
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Running workflow {0}", state);
+                    Callback(state);
+                }
+                catch (Exception e)
+                {
+                    if (WorkflowExecutor.IsIrrecoverableException(e))
+                    {
+                        throw;
+                    }
+                    else
+                    {
+                        service.RaiseExceptionNotHandledEvent(e, (Guid)state);
+                    }
+                }
+            }
+        }
+
+        internal class CallbackInfo
+        {
+            WaitCallback callback;
+            object state;
+            DateTime when;
+            WorkflowSchedulerService service;
+
+            public CallbackInfo(WorkflowSchedulerService service, WaitCallback callback, object state, DateTime when)
+            {
+                this.service = service;
+                this.callback = callback;
+                this.state = state;
+                this.when = when;
+            }
+
+            public DateTime When
+            {
+                get { return when; }
+            }
+
+            public bool IsExpired
+            {
+                get { return DateTime.UtcNow >= when; }
+            }
+
+            public object State
+            {
+                get { return state; }
+            }
+
+            public WaitCallback Callback
+            {
+                get { return callback; }
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/DefaultWorkflowTransactionService.cs

@@ -0,0 +1,123 @@
+//------------------------------------------------------------------------------
+// <copyright file="DefaultWorkflowTransactionService.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Transactions;
+using System.Collections.Specialized;
+using System.Diagnostics;
+using System.Configuration;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary> A simple TransactionService that creates
+    /// <c>System.Transactions.CommittableTransaction</c>.</summary> 
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class DefaultWorkflowCommitWorkBatchService : WorkflowCommitWorkBatchService
+    {
+        private bool _enableRetries = false;
+        private bool _ignoreCommonEnableRetries = false;
+
+        public DefaultWorkflowCommitWorkBatchService()
+        {
+        }
+
+        public DefaultWorkflowCommitWorkBatchService(NameValueCollection parameters)
+        {
+            if (parameters == null)
+                throw new ArgumentNullException("parameters", ExecutionStringManager.MissingParameters);
+
+            if (parameters.Count > 0)
+            {
+                foreach (string key in parameters.Keys)
+                {
+                    if (0 == string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase))
+                    {
+                        _enableRetries = bool.Parse(parameters[key]);
+                        _ignoreCommonEnableRetries = true;
+                    }
+                }
+            }
+        }
+
+        public bool EnableRetries
+        {
+            get { return _enableRetries; }
+            set
+            {
+                _enableRetries = value;
+                _ignoreCommonEnableRetries = true;
+            }
+        }
+
+        protected internal override void Start()
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService: Starting");
+
+            //
+            // If we didn't find a local value for enable retries
+            // check in the common section
+            if ((!_ignoreCommonEnableRetries) && (null != base.Runtime))
+            {
+                NameValueConfigurationCollection commonConfigurationParameters = base.Runtime.CommonParameters;
+                if (commonConfigurationParameters != null)
+                {
+                    // Then scan for connection string in the common configuration parameters section
+                    foreach (string key in commonConfigurationParameters.AllKeys)
+                    {
+                        if (string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase) == 0)
+                        {
+                            _enableRetries = bool.Parse(commonConfigurationParameters[key].Value);
+                            break;
+                        }
+                    }
+                }
+            }
+            base.Start();
+        }
+
+        protected override void OnStopped()
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService: Stopping");
+
+            base.OnStopped();
+        }
+
+        internal protected override void CommitWorkBatch(CommitWorkBatchCallback commitWorkBatchCallback)
+        {
+            DbRetry dbRetry = new DbRetry(_enableRetries);
+            short retryCounter = 0;
+
+            while (true)
+            {
+                if (null != Transaction.Current)
+                {
+                    //
+                    // Can't retry as we don't own the tx
+                    // Set the counter to only allow one iteration
+                    retryCounter = dbRetry.MaxRetries;
+                }
+                try
+                {
+                    base.CommitWorkBatch(commitWorkBatchCallback);
+
+                    break;
+                }
+                catch (Exception e)
+                {
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "DefaultWorkflowCommitWorkBatchService caught exception from commitWorkBatchCallback: " + e.ToString());
+
+                    if (dbRetry.TryDoRetry(ref retryCounter))
+                    {
+                        WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService retrying commitWorkBatchCallback (retry attempt " + retryCounter.ToString(System.Globalization.CultureInfo.InvariantCulture) + ")");
+                        continue;
+                    }
+                    else
+                        throw;
+                }
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/LocalTransaction.cs

@@ -0,0 +1,156 @@
+//------------------------------------------------------------------------------
+// <copyright file="LocalTransaction.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Transactions;
+using System.Data;
+using System.Data.Common;
+using System.Threading;
+
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary>
+    /// This class wraps a local transaction (DbTransaction) by implementing IPromotableSinglePhaseNotification:
+    /// It instantiate a DbTransaction and never allows promotion to a DTC transaction.
+    /// </summary>
+    internal sealed class LocalTransaction : IPromotableSinglePhaseNotification
+    {
+        readonly DbTransaction transaction;
+        System.Data.Common.DbConnection connection;
+        ManualResetEvent handle;
+        object syncRoot = new Object();
+
+        #region Constructor
+
+        /// <summary>
+        /// Wraps a local transaction inside
+        /// </summary>
+        /// <param name="dbHelper"></param>
+        internal LocalTransaction(DbResourceAllocator dbHelper, ManualResetEvent handle)
+        {
+            if (null == handle)
+                throw new ArgumentNullException("handle");
+
+            // Open a connection that specifically does not auto-enlist ("Enlist=false" in connection string)
+            // to prevent auto-promotion of the transaction
+            this.connection = dbHelper.OpenNewConnectionNoEnlist();
+            this.transaction = this.connection.BeginTransaction();
+            this.handle = handle;
+        }
+
+        #endregion Constructor
+
+
+        #region Accessors
+
+        public System.Data.Common.DbConnection Connection
+        {
+            get { return this.connection; }
+        }
+
+        public DbTransaction Transaction
+        {
+            get { return this.transaction; }
+        }
+
+        #endregion Accessors
+
+
+        #region IPromotableSinglePhaseNotification Members
+
+        public void Initialize()
+        {
+        }
+
+        public void SinglePhaseCommit(SinglePhaseEnlistment en)
+        {
+            if (en == null)
+                throw new ArgumentNullException("en");
+
+            //
+            // Wait until IPendingWork members have completed (WinOE bugs 17580 and 13395)
+            try
+            {
+                handle.WaitOne();
+            }
+            catch (ObjectDisposedException)
+            {
+                // If an ObjectDisposedException is thrown because
+                // the WaitHandle has already closed, nothing to worry
+                // about. Move on.
+            }
+
+            lock (syncRoot)
+            {
+                try
+                {
+                    this.transaction.Commit();
+                    en.Committed();
+                }
+                catch (Exception e)
+                {
+                    en.Aborted(e);
+                }
+                finally
+                {
+                    if ((null != connection) && (ConnectionState.Closed != connection.State))
+                    {
+                        connection.Close();
+                        connection = null;
+                    }
+                }
+            }
+        }
+
+        public void Rollback(SinglePhaseEnlistment en)
+        {
+            if (en == null)
+                throw new ArgumentNullException("en");
+
+            //
+            // Wait until IPendingWork members have completed (WinOE bugs 17580 and 13395)
+            try
+            {
+                handle.WaitOne();
+            }
+            catch (ObjectDisposedException)
+            {
+                // If an ObjectDisposedException is thrown because
+                // the WaitHandle has already closed, nothing to worry
+                // about. Move on.
+            }
+            // DbTransaction.Dispose will call Rollback if the DbTransaction is not Zombied.
+            // Not safe to call DbTransaction.Rollback here as the the underlining 
+            // DbTransaction may have already been Rolled back
+            lock (syncRoot)
+            {
+                if (null != transaction)
+                    transaction.Dispose();
+
+                if ((null != connection) && (ConnectionState.Closed != connection.State))
+                {
+                    connection.Close();
+                    connection = null;
+                }
+
+                en.Aborted();
+            }
+        }
+
+        public byte[] Promote()
+        {
+            throw new TransactionPromotionException(
+                ExecutionStringManager.PromotionNotSupported);
+        }
+
+        #endregion IPromotableSinglePhaseNotification Members
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/ManualWorkflowSchedulerService.cs

@@ -0,0 +1,381 @@
+using System;
+using System.Threading;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Collections.ObjectModel;
+using System.Workflow.Runtime;
+using System.Diagnostics;
+using System.Globalization;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class ManualWorkflowSchedulerService : WorkflowSchedulerService
+    {
+        private class CallbackInfo
+        {
+            WaitCallback callback;
+            Guid instanceId;
+            Guid timerId;
+            DateTime when;
+
+            public CallbackInfo(WaitCallback callback, Guid instanceId, Guid timerId, DateTime when)
+            {
+                this.callback = callback;
+                this.when = when;
+                this.instanceId = instanceId;
+                this.timerId = timerId;
+            }
+
+            public DateTime When
+            {
+                get { return when; }
+            }
+
+            public bool IsExpired
+            {
+                get { return DateTime.UtcNow >= when; }
+            }
+
+            public Guid InstanceId { get { return instanceId; } }
+
+            public Guid TimerId { get { return timerId; } }
+
+            public WaitCallback Callback
+            {
+                get { return callback; }
+            }
+        }
+
+        private KeyedPriorityQueue<Guid, CallbackInfo, DateTime> pendingScheduleRequests = new KeyedPriorityQueue<Guid, CallbackInfo, DateTime>();
+        private Dictionary<Guid, DefaultWorkflowSchedulerService.WorkItem> scheduleRequests = new Dictionary<Guid, DefaultWorkflowSchedulerService.WorkItem>();
+        private object locker = new Object();
+        private Timer callbackTimer;
+        private readonly TimerCallback timerCallback;   // non-null indicates that active timers are enabled
+        private volatile bool threadRunning;    // indicates that the timer thread is running
+        private static TimeSpan infinite = new TimeSpan(Timeout.Infinite);
+        private IList<PerformanceCounter> queueCounters;
+        private static TimeSpan fiveMinutes = new TimeSpan(0, 5, 0);
+
+        private const string USE_ACTIVE_TIMERS_KEY = "UseActiveTimers";
+
+        // Note that pendingScheduleRequests are keyed by instance ID under the assertion that there is at most one outstanding
+        // timer for any given instance ID. To support cancellation, and additional map is kept of timerID-to-instanceID so that
+        // we can find the appropriate pending  given a timer ID
+
+        public ManualWorkflowSchedulerService()
+        {
+        }
+
+        public ManualWorkflowSchedulerService(bool useActiveTimers)
+        {
+            if (useActiveTimers)
+            {
+                timerCallback = new TimerCallback(OnTimerCallback);
+                pendingScheduleRequests.FirstElementChanged += OnFirstElementChanged;
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: started with active timers");
+            }
+        }
+        public ManualWorkflowSchedulerService(NameValueCollection parameters)
+        {
+            if (parameters == null)
+                throw new ArgumentNullException("parameters");
+
+            foreach (string key in parameters.Keys)
+            {
+                if (key == null)
+                    throw new ArgumentException(String.Format(Thread.CurrentThread.CurrentCulture, ExecutionStringManager.UnknownConfigurationParameter, "null"));
+                string p = parameters[key];
+                if (!key.Equals(USE_ACTIVE_TIMERS_KEY, StringComparison.OrdinalIgnoreCase))
+                    throw new ArgumentException(String.Format(Thread.CurrentThread.CurrentCulture, ExecutionStringManager.UnknownConfigurationParameter, key));
+                bool useActiveTimers;
+                if (!bool.TryParse(p, out useActiveTimers))
+                    throw new FormatException(USE_ACTIVE_TIMERS_KEY);
+                if (useActiveTimers)
+                {
+                    timerCallback = new TimerCallback(OnTimerCallback);
+                    pendingScheduleRequests.FirstElementChanged += OnFirstElementChanged;
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Started with active timers");
+                }
+            }
+        }
+
+        internal protected override void Schedule(WaitCallback callback, Guid workflowInstanceId)
+        {
+            if (callback == null)
+                throw new ArgumentNullException("callback");
+            if (workflowInstanceId.Equals(Guid.Empty))
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.CantBeEmptyGuid, "workflowInstanceId"));
+
+            lock (locker)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Schedule workflow {0}", workflowInstanceId);
+                if (!scheduleRequests.ContainsKey(workflowInstanceId))
+                    scheduleRequests.Add(workflowInstanceId, new DefaultWorkflowSchedulerService.WorkItem(callback, workflowInstanceId));
+            }
+            if (queueCounters != null)
+            {
+                foreach (PerformanceCounter p in queueCounters)
+                {
+                    p.RawValue = scheduleRequests.Count;
+                }
+            }
+        }
+
+        internal protected override void Schedule(WaitCallback callback, Guid workflowInstanceId, DateTime whenUtc, Guid timerId)
+        {
+            if (callback == null)
+                throw new ArgumentNullException("callback");
+            if (workflowInstanceId.Equals(Guid.Empty))
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.CantBeEmptyGuid, "workflowInstanceId"));
+            if (timerId.Equals(Guid.Empty))
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.CantBeEmptyGuid, "timerId"));
+
+            lock (locker)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Schedule timer {0} for workflow {1} at {2}", timerId, workflowInstanceId, whenUtc);
+                pendingScheduleRequests.Enqueue(timerId, new CallbackInfo(callback, workflowInstanceId, timerId, whenUtc), whenUtc);
+            }
+        }
+
+        internal protected override void Cancel(Guid timerId)
+        {
+            if (timerId.Equals(Guid.Empty))
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.CantBeEmptyGuid, "timerId"));
+
+            lock (locker)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Cancel timer {0}", timerId);
+                pendingScheduleRequests.Remove(timerId);
+            }
+        }
+
+        private bool RunOne(Guid workflowInstanceId)
+        {
+            bool retval = false;
+            DefaultWorkflowSchedulerService.WorkItem cs = null;
+            lock (locker)
+            {
+                if (scheduleRequests.ContainsKey(workflowInstanceId))
+                {
+                    cs = scheduleRequests[workflowInstanceId];
+                    scheduleRequests.Remove(workflowInstanceId);
+                }
+            }
+            try
+            {
+                if (cs != null)
+                {
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Executing {0}", workflowInstanceId);
+                    if (queueCounters != null)
+                    {
+                        foreach (PerformanceCounter p in queueCounters)
+                        {
+                            p.RawValue = scheduleRequests.Count;
+                        }
+                    }
+                    cs.Invoke(this);
+                    retval = true;
+                }
+            }
+            catch (Exception e)
+            {
+                RaiseServicesExceptionNotHandledEvent(e, workflowInstanceId);
+            }
+            return retval;
+        }
+
+        private bool HasExpiredTimer(Guid workflowInstanceId, out Guid timerId)
+        {
+            lock (locker)
+            {
+                CallbackInfo ci = pendingScheduleRequests.FindByPriority(DateTime.UtcNow,
+                    delegate(CallbackInfo c) { return c.InstanceId == workflowInstanceId; });
+                if (ci != null)
+                {
+                    timerId = ci.TimerId;
+                    return true;
+                }
+            }
+            timerId = Guid.Empty;
+            return false;
+        }
+        private bool ProcessTimer(Guid workflowInstanceId)
+        {
+            bool retval = false;
+            CallbackInfo cs = null;
+            Guid timerId = Guid.Empty;
+            lock (locker)
+            {
+                Guid expTimerId;
+                if (HasExpiredTimer(workflowInstanceId, out expTimerId))
+                {
+                    cs = pendingScheduleRequests.Remove(expTimerId);
+                }
+            }
+            try
+            {
+                if (cs != null)
+                {
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Processing timer {0}", timerId);
+                    cs.Callback(cs.InstanceId);
+                    retval = true;
+                }
+            }
+            catch (Exception e)
+            {
+                RaiseServicesExceptionNotHandledEvent(e, workflowInstanceId);
+            }
+            return retval;
+        }
+
+        private bool CanRun(Guid workflowInstanceId)
+        {
+            bool retval = false;
+            lock (locker)
+            {
+                Guid timerId;
+                retval = scheduleRequests.ContainsKey(workflowInstanceId) || HasExpiredTimer(workflowInstanceId, out timerId);
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: CanRun is {0}", retval);
+            }
+            return retval;
+        }
+
+        public bool RunWorkflow(Guid workflowInstanceId)
+        {
+            if (workflowInstanceId.Equals(Guid.Empty))
+                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.CantBeEmptyGuid, "workflowInstanceId"));
+
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "ManualWorkflowSchedulerService: Running workflow {0}", workflowInstanceId);
+
+            bool retval = false; // return true if we do any work at all
+            while (CanRun(workflowInstanceId))
+            {
+                if (RunOne(workflowInstanceId) || ProcessTimer(workflowInstanceId))
+                    retval = true;  // did some work, try again
+                else
+                    break;  // no work done this iteration
+            }
+            return retval;
+        }
+        private Timer CreateTimerCallback(CallbackInfo info)
+        {
+            DateTime now = DateTime.UtcNow;
+            TimeSpan span = (info.When > now) ? info.When - now : TimeSpan.Zero;
+            // never let more than five minutes go by without checking
+            if (span > fiveMinutes)
+            {
+                span = fiveMinutes;
+            }
+            return new Timer(timerCallback, info.InstanceId, span, infinite);
+        }
+        override protected void OnStarted()
+        {
+            base.OnStarted();
+            if (this.timerCallback != null)
+            {
+                lock (locker)
+                {
+                    CallbackInfo ci = pendingScheduleRequests.Peek();
+                    if (ci != null)
+                        callbackTimer = CreateTimerCallback(ci);
+                }
+            }
+            lock (locker)
+            {
+                if (queueCounters == null && this.Runtime.PerformanceCounterManager != null)
+                {
+                    queueCounters = this.Runtime.PerformanceCounterManager.CreateCounters(ExecutionStringManager.PerformanceCounterWorkflowsWaitingName);
+                }
+            }
+        }
+        protected internal override void Stop()
+        {
+            base.Stop();
+            if (this.timerCallback != null)
+            {
+                lock (locker)
+                {
+                    if (callbackTimer != null)
+                    {
+                        callbackTimer.Dispose();
+                        callbackTimer = null;
+                    }
+                }
+            }
+        }
+        private void OnTimerCallback(object ignored)
+        {
+            CallbackInfo ci = null;
+            try
+            {
+                lock (locker)
+                {
+                    if (State.Equals(WorkflowRuntimeServiceState.Started))
+                    {
+                        ci = pendingScheduleRequests.Peek();
+                        if (ci != null)
+                        {
+                            if (ci.IsExpired)
+                            {
+                                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Timeout occured for timer for instance {0}", ci.InstanceId);
+                                threadRunning = true;
+                                pendingScheduleRequests.Dequeue();
+                            }
+                            else
+                            {
+                                callbackTimer = CreateTimerCallback(ci);
+                            }
+                        }
+                    }
+                }
+                if (threadRunning)
+                {
+                    ci.Callback(ci.InstanceId);  // delivers the timer message
+                    RunWorkflow(ci.InstanceId);
+                }
+            }
+            catch (ThreadAbortException e)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "Timeout for instance, {0} threw exception {1}", ci == null ? Guid.Empty : ci.InstanceId, e.Message);
+                RaiseServicesExceptionNotHandledEvent(e, ci.InstanceId);
+                throw;
+            }
+            catch (Exception e)
+            {
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "Timeout for instance, {0} threw exception {1}", ci == null ? Guid.Empty : ci.InstanceId, e.Message);
+                RaiseServicesExceptionNotHandledEvent(e, ci.InstanceId);
+            }
+            finally
+            {
+                lock (locker)
+                {
+                    if (threadRunning)
+                    {
+                        threadRunning = false;
+                        ci = pendingScheduleRequests.Peek();
+                        if (ci != null)
+                            callbackTimer = CreateTimerCallback(ci);
+                    }
+                }
+            }
+        }
+        private void OnFirstElementChanged(object source, KeyedPriorityQueueHeadChangedEventArgs<CallbackInfo> e)
+        {
+            lock (locker)
+            {
+                if (threadRunning)
+                    return;     // ignore when a timer thread is already processing a timer request
+                if (callbackTimer != null)
+                {
+                    callbackTimer.Dispose();
+                    callbackTimer = null;
+                }
+                if (e.NewFirstElement != null && this.State == WorkflowRuntimeServiceState.Started)
+                {
+                    callbackTimer = CreateTimerCallback(e.NewFirstElement);
+                }
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/PersistenceException.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Threading;
+using System.Workflow;
+using System.Workflow.Runtime;
+using System.Workflow.ComponentModel;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    #region Runtime Exceptions
+    [Serializable]
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class PersistenceException : SystemException
+    {
+        public PersistenceException() : base(string.Format(CultureInfo.CurrentCulture, ExecutionStringManager.PersistenceException)) { }
+        public PersistenceException(string message) : base(message) { }
+        public PersistenceException(string message, Exception innerException) : base(message, innerException) { }
+
+        [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]
+        protected PersistenceException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+    #endregion
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/SharedConnectionInfo.cs

@@ -0,0 +1,113 @@
+//------------------------------------------------------------------------------
+// <copyright file="SharedConnectionInfo.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Diagnostics;
+using System.Transactions;
+using System.Data.Common;
+using System.Threading;
+
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary>
+    /// This class keeps the following associated with a Transaction
+    /// - a connection that participates in the transaction.
+    /// - an optional local transaction (DbTransaction) generated from the single-phase-committed Transaction.
+    /// The connection and the local transaction are passed around to different host components to 
+    /// do transacted DB work using the shared connection.
+    /// </summary>
+    internal sealed class SharedConnectionInfo : IDisposable
+    {
+        readonly DbConnection connection;
+        readonly DbTransaction localTransaction;
+        private bool disposed;
+        private ManualResetEvent handle;
+
+        #region Constructor
+
+        /// <summary>
+        /// Instantiate an opened connection enlisted to the Transaction
+        /// if promotable is false, the Transaction wraps a local 
+        /// transaction inside and can never be promoted
+        /// </summary>
+        /// <param name="dbResourceAllocator"></param>
+        /// <param name="transaction"></param>
+        /// <param name="wantPromotable"></param>
+        internal SharedConnectionInfo(
+            DbResourceAllocator dbResourceAllocator,
+            Transaction transaction,
+            bool wantPromotable,
+            ManualResetEvent handle)
+        {
+            Debug.Assert((transaction != null), "Null Transaction!");
+
+            if (null == handle)
+                throw new ArgumentNullException("handle");
+
+            this.handle = handle;
+
+            if (wantPromotable)
+            {
+                // Enlist a newly opened connection to this regular Transaction
+                this.connection = dbResourceAllocator.OpenNewConnection();
+                this.connection.EnlistTransaction(transaction);
+            }
+            else
+            {
+                // Make this transaction no longer promotable by attaching our 
+                // IPromotableSinglePhaseNotification implementation (LocalTranscaction)
+                // and track the DbConnection and DbTransaction associated with the LocalTranscaction
+                LocalTransaction localTransaction = new LocalTransaction(dbResourceAllocator, handle);
+                transaction.EnlistPromotableSinglePhase(localTransaction);
+                this.connection = localTransaction.Connection;
+                this.localTransaction = localTransaction.Transaction;
+            }
+        }
+
+        #endregion Constructor
+
+        #region Accessors
+
+        internal DbConnection DBConnection
+        {
+            get { return this.connection; }
+        }
+
+        internal DbTransaction DBTransaction
+        {
+            get { return this.localTransaction; }
+        }
+
+        #endregion Accessors
+
+        #region IDisposable Members
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        private void Dispose(bool disposing)
+        {
+            if (!this.disposed)
+            {
+                //
+                // If we're using a LocalTransaction it will close the connection
+                // in it's IPromotableSinglePhaseNotification methods
+                if ((this.localTransaction == null) && (null != connection))
+                    this.connection.Dispose();
+            }
+            this.disposed = true;
+        }
+
+        #endregion
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/SharedConnectionWorkflowTransactionService.cs

@@ -0,0 +1,295 @@
+#pragma warning disable 1634, 1691
+//------------------------------------------------------------------------------
+// <copyright file="SharedConnectionWorkflowTransactionService.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+#region Using directives
+
+using System;
+using System.Transactions;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Configuration;
+using System.Threading;
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class SharedConnectionWorkflowCommitWorkBatchService : WorkflowCommitWorkBatchService
+    {
+        private DbResourceAllocator dbResourceAllocator;
+        private IDictionary<Transaction, SharedConnectionInfo> transactionConnectionTable;
+        private object tableSyncObject = new object();
+
+        // Saved from constructor input to be used in service start initialization        
+        private NameValueCollection configParameters;
+        string unvalidatedConnectionString;
+        private bool _enableRetries = false;
+        private bool _ignoreCommonEnableRetries = false;
+
+        /// <summary>
+        /// Enables the adding of this service programmatically.
+        /// </summary>
+        /// <param name="runtime"></param>
+        /// <param name="connectionString"></param>
+        public SharedConnectionWorkflowCommitWorkBatchService(string connectionString)
+        {
+            if (String.IsNullOrEmpty(connectionString))
+                throw new ArgumentNullException("connectionString", ExecutionStringManager.MissingConnectionString);
+
+            this.unvalidatedConnectionString = connectionString;
+        }
+
+        /// <summary>
+        /// Enables adding of this service from a config file.
+        /// Get the connection string from the runtime common parameter section or the particular service parameter section 
+        /// of the configuration file, and instantiate a DbResourceAllocator object.
+        /// </summary>
+        /// <param name="runtime"></param>
+        /// <param name="parameters"></param>
+        public SharedConnectionWorkflowCommitWorkBatchService(NameValueCollection parameters)
+        {
+            if (parameters == null)
+                throw new ArgumentNullException("parameters", ExecutionStringManager.MissingParameters);
+
+            if (parameters.Count > 0)
+            {
+                foreach (string key in parameters.Keys)
+                {
+                    if (0 == string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase))
+                    {
+                        _enableRetries = bool.Parse(parameters[key]);
+                        _ignoreCommonEnableRetries = true;
+                    }
+                }
+            }
+
+            this.configParameters = parameters;
+        }
+
+        #region Accessors
+        internal string ConnectionString
+        {
+            get
+            {
+#pragma warning disable 56503
+                if (this.dbResourceAllocator == null)
+                {
+                    // Other hosting services may try to get the connection string during their initialization phase 
+                    // (in WorkflowRuntimeService.Start) to dectect string mismatch conflict
+                    if (this.Runtime == null)
+                        throw new InvalidOperationException(ExecutionStringManager.WorkflowRuntimeNotStarted);
+                    this.dbResourceAllocator = new DbResourceAllocator(this.Runtime, this.configParameters, this.unvalidatedConnectionString);
+                }
+#pragma warning restore 56503
+                return this.dbResourceAllocator.ConnectionString;
+            }
+        }
+
+        public bool EnableRetries
+        {
+            get { return _enableRetries; }
+            set
+            {
+                _enableRetries = value;
+                _ignoreCommonEnableRetries = true;
+            }
+        }
+        #endregion Accessors
+
+        #region WorkflowRuntimeService
+        override protected internal void Start()
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "SharedConnectionWorkflowCommitWorkBatchService: Starting");
+
+            this.dbResourceAllocator = new DbResourceAllocator(this.Runtime, this.configParameters, this.unvalidatedConnectionString);            
+            if (this.transactionConnectionTable == null)
+                this.transactionConnectionTable = new Dictionary<Transaction, SharedConnectionInfo>();
+
+            //
+            // If we didn't find a local value for enable retries
+            // check in the common section
+            if ((!_ignoreCommonEnableRetries) && (null != base.Runtime))
+            {
+                NameValueConfigurationCollection commonConfigurationParameters = base.Runtime.CommonParameters;
+                if (commonConfigurationParameters != null)
+                {
+                    // Then scan for connection string in the common configuration parameters section
+                    foreach (string key in commonConfigurationParameters.AllKeys)
+                    {
+                        if (string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase) == 0)
+                        {
+                            _enableRetries = bool.Parse(commonConfigurationParameters[key].Value);
+                            break;
+                        }
+                    }
+                }
+            }
+
+            base.Start();
+        }
+
+        protected override void OnStopped()
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "SharedConnectionWorkflowCommitWorkBatchService: Stopping");
+            foreach (KeyValuePair<Transaction, SharedConnectionInfo> kvp in this.transactionConnectionTable)
+            {
+                kvp.Value.Dispose();
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Removing transaction " + kvp.Key.GetHashCode());
+            }
+            this.transactionConnectionTable.Clear();
+            this.dbResourceAllocator = null;
+            base.OnStopped();
+        }
+        #endregion Public Methods
+
+        #region Public Methods
+
+        protected internal override void CommitWorkBatch(WorkflowCommitWorkBatchService.CommitWorkBatchCallback commitWorkBatchCallback)
+        {
+            //
+            // Disable retries by default, reset to allow retries below if we own the tx
+            DbRetry dbRetry = new DbRetry(_enableRetries);
+            short retryCounter = dbRetry.MaxRetries;
+
+            while (true)
+            {
+                //
+                // When using LocalTransaction handle block access to the connection 
+                // in the transaction event handlers until all IPendingWork members have completed
+                ManualResetEvent handle = new ManualResetEvent(false);
+                Transaction tx = null;
+                SharedConnectionInfo connectionInfo = null;
+
+                try
+                {
+                    if (null == Transaction.Current)
+                    {
+                        //
+                        // It's OK to retry here as we own the tx
+                        retryCounter = 0;
+                        //
+                        // Create a local, non promotable transaction that we share with our OOB services
+                        tx = new CommittableTransaction();
+                        connectionInfo = new SharedConnectionInfo(this.dbResourceAllocator, tx, false, handle);
+                    }
+                    else
+                    {
+                        //
+                        // Can't retry as we don't own the tx
+                        // Create a dependent transaction and don't restrict promotion.
+                        tx = Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete);
+                        connectionInfo = new SharedConnectionInfo(this.dbResourceAllocator, tx, true, handle);
+                    }
+
+                    AddToConnectionInfoTable(tx, connectionInfo);
+
+                    using (TransactionScope ts = new TransactionScope(tx))
+                    {
+                        try
+                        {
+                            commitWorkBatchCallback();
+                            ts.Complete();
+                        }
+                        finally
+                        {
+                            RemoveConnectionFromInfoTable(tx);
+                            //
+                            // Unblock transaction event handlers
+                            handle.Set();
+                        }
+                    }
+
+                    CommittableTransaction committableTransaction = tx as CommittableTransaction;
+                    if (committableTransaction != null)
+                        committableTransaction.Commit();
+
+                    DependentTransaction dependentTransaction = tx as DependentTransaction;
+                    if (dependentTransaction != null)
+                        dependentTransaction.Complete();
+
+                    break;
+                }
+                catch (Exception e)
+                {
+                    tx.Rollback();
+
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "SharedConnectionWorkflowCommitWorkBatchService caught exception from commitWorkBatchCallback: " + e.ToString());
+
+                    if (dbRetry.TryDoRetry(ref retryCounter))
+                    {
+                        WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "SharedConnectionWorkflowCommitWorkBatchService retrying commitWorkBatchCallback (retry attempt " + retryCounter.ToString(System.Globalization.CultureInfo.InvariantCulture) + ")");
+                        continue;
+                    }
+                    else
+                        throw;
+                }
+                finally
+                {
+                    handle.Close();
+                    if (tx != null)
+                    {
+                        tx.Dispose();
+                    }
+                }
+            }
+        }
+        /// <summary>
+        /// Get the SharedConnectionInfo object from the hashtable keyed by the transaction
+        /// </summary>
+        /// <param name="transaction"></param>
+        /// <returns></returns>
+        internal SharedConnectionInfo GetConnectionInfo(Transaction transaction)
+        {
+            return LookupConnectionInfoTable(transaction);
+        }
+
+        #endregion Public Methods
+
+        #region Private Methods
+
+        private void RemoveConnectionFromInfoTable(Transaction transaction)
+        {
+            lock (this.tableSyncObject)
+            {
+                SharedConnectionInfo connectionInfo;
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "TransactionCompleted " + transaction.GetHashCode());
+                if (transactionConnectionTable.TryGetValue(transaction, out connectionInfo))
+                {
+                    connectionInfo.Dispose();
+                    this.transactionConnectionTable.Remove(transaction);
+                }
+                else
+                {
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "TransactionCompleted " + transaction.GetHashCode() +
+                        " not found in table of count " + this.transactionConnectionTable.Count);                
+                }
+            } 
+        }
+
+        private void AddToConnectionInfoTable(Transaction transaction, SharedConnectionInfo connectionInfo)
+        {
+            lock (this.tableSyncObject)
+            {
+                this.transactionConnectionTable.Add(transaction, connectionInfo);
+                WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "AddToConnectionInfoTable " + transaction.GetHashCode() +
+                        " in table of count " + this.transactionConnectionTable.Count); 
+            }
+        }
+
+        private SharedConnectionInfo LookupConnectionInfoTable(Transaction transaction)
+        {
+            lock (this.tableSyncObject)
+            {
+                return transactionConnectionTable[transaction];
+            }
+        }
+
+        #endregion Private Methods
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/SqlPersistenceWorkflowInstanceDescription.cs

@@ -0,0 +1,50 @@
+using System;
+using System.IO;
+using System.Transactions;
+using System.Diagnostics;
+using System.Data;
+using System.Data.Common;
+using System.Data.SqlTypes;
+using System.Data.SqlClient;
+using System.Runtime.Serialization;
+using System.Runtime.Serialization.Formatters.Binary;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Configuration;
+using System.Text.RegularExpressions;
+using System.Security.Permissions;
+using System.Threading;
+
+using System.Workflow.Runtime.Hosting;
+using System.Workflow.Runtime;
+using System.Workflow.ComponentModel;
+using System.Globalization;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public class SqlPersistenceWorkflowInstanceDescription
+    {
+        private Guid workflowInstanceId;
+        private WorkflowStatus status;
+        private bool isBlocked;
+        private string suspendOrTerminateDescription;
+        private SqlDateTime nextTimerExpiration;
+
+        internal SqlPersistenceWorkflowInstanceDescription(Guid workflowInstanceId, WorkflowStatus status, bool isBlocked, string suspendOrTerminateDescription, SqlDateTime nextTimerExpiration)
+        {
+            this.workflowInstanceId = workflowInstanceId;
+            this.status = status;
+            this.isBlocked = isBlocked;
+            this.suspendOrTerminateDescription = suspendOrTerminateDescription;
+            this.nextTimerExpiration = nextTimerExpiration;
+        }
+
+        public Guid WorkflowInstanceId { get { return workflowInstanceId; } }
+        public WorkflowStatus Status { get { return status; } }
+        public bool IsBlocked { get { return isBlocked; } }
+        public string SuspendOrTerminateDescription { get { return suspendOrTerminateDescription; } }
+        public SqlDateTime NextTimerExpiration { get { return nextTimerExpiration; } }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowLoaderService.cs

@@ -0,0 +1,29 @@
+#region Imports
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Collections.Generic;
+using System.Xml;
+using System.Text;
+using System.IO;
+using System.ComponentModel.Design;
+using System.ComponentModel.Design.Serialization;
+using System.Workflow.ComponentModel;
+using System.Workflow.ComponentModel.Compiler;
+using System.Workflow.ComponentModel.Serialization;
+using System.Workflow.ComponentModel.Design;
+using System.Workflow.Runtime;
+
+#endregion
+
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public abstract class WorkflowLoaderService : WorkflowRuntimeService
+    {
+        protected internal abstract Activity CreateInstance(Type workflowType);
+        protected internal abstract Activity CreateInstance(XmlReader workflowDefinitionReader, XmlReader rulesReader);
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowPersistenceService.cs

@@ -0,0 +1,110 @@
+//------------------------------------------------------------------------------
+// <copyright file="StatePersistenceService.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Workflow.Runtime;
+using System.Workflow.ComponentModel;
+using System.Diagnostics;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary> Service for saving engine state. </summary>
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public abstract class WorkflowPersistenceService : WorkflowRuntimeService
+    {
+        /// <summary> Saves the state of a workflow instance. </summary>
+        /// <param name="state"> The workflow instance state to save </param>
+        internal protected abstract void SaveWorkflowInstanceState(Activity rootActivity, bool unlock);
+
+        /// <summary></summary>
+        /// <param name="state"></param>
+        internal protected abstract void UnlockWorkflowInstanceState(Activity rootActivity);
+
+        /// <summary> Loads the state of a workflow instance. </summary>
+        /// <param name="instanceId"> The unique ID of the instance to load </param>
+        /// <returns> The workflow instance state</returns>
+        internal protected abstract Activity LoadWorkflowInstanceState(Guid instanceId);
+
+        /// <summary> Saves the state of a completed scope. </summary>
+        /// <param name="completedScopeState"> The completed scope to save </param>
+        internal protected abstract void SaveCompletedContextActivity(Activity activity);
+
+        /// <summary> Loads the state of a completed scope </summary>
+        /// <param name="scopeId"> The unique identifier of the completed scope </param>
+        /// <returns> The completed scope or null </returns>
+        internal protected abstract Activity LoadCompletedContextActivity(Guid scopeId, Activity outerActivity);
+
+        /// <summary></summary>
+        /// <param name="activity"></param>
+        /// <returns>The value of the "UnloadOnIdle" flag</returns>
+        internal protected abstract bool UnloadOnIdle(Activity activity);
+
+        static protected byte[] GetDefaultSerializedForm(Activity activity)
+        {
+            DateTime startTime = DateTime.Now;
+            Byte[] result;
+
+            Debug.Assert(activity != null, "Null activity");
+            using (MemoryStream stream = new MemoryStream(10240))
+            {
+                stream.Position = 0;
+                activity.Save(stream);
+                using (MemoryStream compressedStream = new MemoryStream((int)stream.Length))
+                {
+                    using (GZipStream gzs = new GZipStream(compressedStream, CompressionMode.Compress, true))
+                    {
+                        gzs.Write(stream.GetBuffer(), 0, (int)stream.Length);
+                    }
+
+                    ActivityExecutionContextInfo executionContextInfo = (ActivityExecutionContextInfo)activity.GetValue(Activity.ActivityExecutionContextInfoProperty);
+                    TimeSpan timeElapsed = DateTime.Now - startTime;
+                    WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0,
+                        "Serialized a {0} with id {1} to length {2}. Took {3}.",
+                        executionContextInfo, executionContextInfo.ContextGuid, compressedStream.Length, timeElapsed);
+
+                    result = compressedStream.GetBuffer();
+                    Array.Resize<Byte>(ref result, Convert.ToInt32(compressedStream.Length));
+                }
+            }
+            return result;
+        }
+
+        static protected Activity RestoreFromDefaultSerializedForm(Byte[] activityBytes, Activity outerActivity)
+        {
+            DateTime startTime = DateTime.Now;
+            Activity state;
+
+            MemoryStream stream = new MemoryStream(activityBytes);
+            stream.Position = 0;
+
+            using (GZipStream gzs = new GZipStream(stream, CompressionMode.Decompress, true))
+            {
+                state = Activity.Load(gzs, outerActivity);
+            }
+            Debug.Assert(state != null, "invalid state recovered");
+            TimeSpan timeElapsed = DateTime.Now - startTime;
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0,
+                "Deserialized a {0} to length {1}. Took {2}.",
+                state, stream.Length, timeElapsed);
+
+            return state;
+        }
+        static protected internal bool GetIsBlocked(Activity rootActivity)
+        {
+            return (bool)rootActivity.GetValue(WorkflowExecutor.IsBlockedProperty);
+        }
+        static protected internal string GetSuspendOrTerminateInfo(Activity rootActivity)
+        {
+            return (string)rootActivity.GetValue(WorkflowExecutor.SuspendOrTerminateInfoProperty);
+        }
+        static protected internal WorkflowStatus GetWorkflowStatus(Activity rootActivity)
+        {
+            return (WorkflowStatus)rootActivity.GetValue(WorkflowExecutor.WorkflowStatusProperty);
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowRuntimeService.cs

@@ -0,0 +1,102 @@
+// <copyright file="WorkflowRuntimeService.cs" company="Microsoft">Copyright (c) Microsoft Corporation.  All rights reserved.</copyright>
+
+using System;
+using System.Globalization;
+
+using System.Workflow.Runtime;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public enum WorkflowRuntimeServiceState
+    {
+        Stopped,
+        Starting,
+        Started,
+        Stopping
+    }
+
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    abstract public class WorkflowRuntimeService
+    {
+        private WorkflowRuntime _runtime;
+        private WorkflowRuntimeServiceState state = WorkflowRuntimeServiceState.Stopped;
+
+        protected WorkflowRuntime Runtime
+        {
+            get
+            {
+                return _runtime;
+            }
+
+        }
+
+        internal void SetRuntime(WorkflowRuntime runtime)
+        {
+            if (runtime == null && _runtime != null)
+            {
+                _runtime.Started -= this.HandleStarted;
+                _runtime.Stopped -= this.HandleStopped;
+            }
+            _runtime = runtime;
+            if (runtime != null)
+            {
+                _runtime.Started += this.HandleStarted;
+                _runtime.Stopped += this.HandleStopped;
+            }
+        }
+
+        protected void RaiseServicesExceptionNotHandledEvent(Exception exception, Guid instanceId)
+        {
+            Runtime.RaiseServicesExceptionNotHandledEvent(exception, instanceId);
+        }
+
+        internal void RaiseExceptionNotHandledEvent(Exception exception, Guid instanceId)
+        {
+            Runtime.RaiseServicesExceptionNotHandledEvent(exception, instanceId);
+        }
+
+        protected WorkflowRuntimeServiceState State
+        {
+            get { return state; }
+        }
+
+        virtual internal protected void Start()
+        {
+            if (_runtime == null)
+                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.ServiceNotAddedToRuntime, this.GetType().Name));
+            if (state.Equals(WorkflowRuntimeServiceState.Started))
+                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.ServiceAlreadyStarted, this.GetType().Name));
+
+            state = WorkflowRuntimeServiceState.Starting;
+        }
+
+        virtual internal protected void Stop()
+        {
+            if (_runtime == null)
+                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.ServiceNotAddedToRuntime, this.GetType().Name));
+            if (state.Equals(WorkflowRuntimeServiceState.Stopped))
+                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.ServiceNotStarted, this.GetType().Name));
+
+            state = WorkflowRuntimeServiceState.Stopping;
+        }
+
+        virtual protected void OnStarted()
+        { }
+
+        virtual protected void OnStopped()
+        { }
+
+        private void HandleStarted(object source, WorkflowRuntimeEventArgs e)
+        {
+            state = WorkflowRuntimeServiceState.Started;
+            this.OnStarted();
+        }
+
+        private void HandleStopped(object source, WorkflowRuntimeEventArgs e)
+        {
+            state = WorkflowRuntimeServiceState.Stopped;
+            this.OnStopped();
+        }
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowSchedulerService.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Threading;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public abstract class WorkflowSchedulerService : WorkflowRuntimeService
+    {
+        internal protected abstract void Schedule(WaitCallback callback, Guid workflowInstanceId);
+        internal protected abstract void Schedule(WaitCallback callback, Guid workflowInstanceId, DateTime whenUtc, Guid timerId);
+        internal protected abstract void Cancel(Guid timerId);
+    }
+}

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowTimerService.cs

@@ -0,0 +1,30 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.     All rights    reserved.
+//------------------------------------------------------------
+using System.Workflow.ComponentModel;
+using System.Workflow.Runtime;
+using System.Threading;
+
+namespace System.Workflow.Runtime.Hosting
+{
+    class WorkflowTimerService : WorkflowRuntimeService, ITimerService
+    {
+        public WorkflowTimerService()
+            : base()
+        {
+        }
+
+        public void ScheduleTimer(WaitCallback callback, Guid workflowInstanceId, DateTime whenUtc, Guid timerId)
+        {
+            WorkflowSchedulerService schedulerService = this.Runtime.GetService(typeof(WorkflowSchedulerService)) as WorkflowSchedulerService;
+            schedulerService.Schedule(callback, workflowInstanceId, whenUtc, timerId);
+        }
+
+        public void CancelTimer(Guid timerId)
+        {
+            WorkflowSchedulerService schedulerService = this.Runtime.GetService(typeof(WorkflowSchedulerService)) as WorkflowSchedulerService;
+            schedulerService.Cancel(timerId);
+        }
+    }
+}
+

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowTransactionService.cs

@@ -0,0 +1,61 @@
+//------------------------------------------------------------------------------
+// <copyright file="WorkflowTransactionService.cs" company="Microsoft">
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+
+#region Using directives
+
+using System;
+using System.Transactions;
+
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public abstract class WorkflowCommitWorkBatchService : WorkflowRuntimeService
+    {
+        public delegate void CommitWorkBatchCallback();
+
+        virtual internal protected void CommitWorkBatch(CommitWorkBatchCallback commitWorkBatchCallback)
+        {
+            Transaction tx = null;
+            if (null == Transaction.Current)
+                tx = new CommittableTransaction();
+            else
+                tx = Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete);
+
+            try
+            {
+                using (TransactionScope ts = new TransactionScope(tx))
+                {
+                    commitWorkBatchCallback();
+                    ts.Complete();
+                }
+
+                CommittableTransaction committableTransaction = tx as CommittableTransaction;
+                if (committableTransaction != null)
+                    committableTransaction.Commit();
+
+                DependentTransaction dependentTransaction = tx as DependentTransaction;
+                if (dependentTransaction != null)
+                    dependentTransaction.Complete();
+            }
+            catch (Exception e)
+            {
+                tx.Rollback(e);
+                throw;
+            }
+            finally
+            {
+                if (tx != null)
+                {
+                    tx.Dispose();
+                }
+            }
+        }
+    }
+}
+

mcs/class/referencesource/System.Workflow.Runtime/Hosting/WorkflowWebHostingModule.cs

@@ -0,0 +1,96 @@
+/*******************************************************************************
+// Copyright (C) 2000-2001 Microsoft Corporation.  All rights reserved.
+//
+// CONTENTS
+//     Workflow Web Hosting Module.
+ 
+// DESCRIPTION
+//      Implementation of Workflow Web Host Module.
+ 
+// REVISIONS
+// Date          Ver     By           Remarks
+// ~~~~~~~~~~    ~~~     ~~~~~~~~     ~~~~~~~~~~~~~~
+// 02/22/05      1.0     [....]       Implementation.
+ * ****************************************************************************/
+
+#region Using directives
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+using System.Web;
+using System.Collections.Specialized;
+using System.Threading;
+
+#endregion
+
+namespace System.Workflow.Runtime.Hosting
+{
+    /// <summary>
+    /// Cookie based rotuing module implementation
+    /// </summary>
+    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
+    public sealed class WorkflowWebHostingModule : IHttpModule
+    {
+        HttpApplication currentApplication;
+
+        public WorkflowWebHostingModule()
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Workflow Web Hosting Module Created");            
+        }
+
+        /// <summary>
+        /// IHttpModule.Init()
+        /// </summary>
+        /// <param name="application"></param>
+        void IHttpModule.Init(HttpApplication application)
+        {
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "Workflow Web Hosting Module Initialized");
+
+            this.currentApplication = application;
+
+            //Listen for Acquire and ReleaseRequestState event
+            application.ReleaseRequestState += this.OnReleaseRequestState;
+            application.AcquireRequestState += this.OnAcquireRequestState;
+        }
+
+        void IHttpModule.Dispose()
+        {
+
+        }
+
+        void OnAcquireRequestState(Object sender, EventArgs e)
+        {
+            //Performs Cookie based routing.
+            WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "WebHost Module Routing Begin");
+
+            HttpCookie routingCookie = HttpContext.Current.Request.Cookies.Get("WF_WorkflowInstanceId");
+
+            if (routingCookie != null)
+            {
+                HttpContext.Current.Items.Add("__WorkflowInstanceId__", new Guid(routingCookie.Value));
+            }
+            //else no routing information found, it could be activation request or non workflow based request.
+        }
+
+        void OnReleaseRequestState(Object sender, EventArgs e)
+        {
+            //Saves cookie back to client.
+            HttpCookie cookie = HttpContext.Current.Request.Cookies.Get("WF_WorkflowInstanceId");
+
+            if (cookie == null)
+            {
+                cookie = new HttpCookie("WF_WorkflowInstanceId");
+                Object workflowInstanceId = HttpContext.Current.Items["__WorkflowInstanceId__"];
+
+                if (workflowInstanceId != null)
+                {
+                    cookie.Value = workflowInstanceId.ToString();
+                    HttpContext.Current.Response.Cookies.Add(cookie);
+                }
+            }            
+        }        
+    }   
+}