Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Routing/BoundUrl.cs

@@ -0,0 +1,14 @@
+namespace System.Web.Routing {
+    // Represents a URL generated from a ParsedRoute
+    internal class BoundUrl {
+        public string Url {
+            get;
+            set;
+        }
+
+        public RouteValueDictionary Values {
+            get;
+            set;
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/ContentPathSegment.cs

@@ -0,0 +1,43 @@
+namespace System.Web.Routing {
+    using System.Collections.Generic;
+    using System.Linq;
+
+    // Represents a segment of a URL that is not a separator. It contains subsegments such as literals and parameters.
+    internal sealed class ContentPathSegment : PathSegment {
+        public ContentPathSegment(IList<PathSubsegment> subsegments) {
+            Subsegments = subsegments;
+        }
+
+        public bool IsCatchAll {
+            get {
+                // 
+                return Subsegments.Any<PathSubsegment>(seg => (seg is ParameterSubsegment) && (((ParameterSubsegment)seg).IsCatchAll));
+            }
+        }
+
+        public IList<PathSubsegment> Subsegments {
+            get;
+            private set;
+        }
+
+#if ROUTE_DEBUGGING
+        public override string LiteralText {
+            get {
+                List<string> s = new List<string>();
+                foreach (PathSubsegment subsegment in Subsegments) {
+                    s.Add(subsegment.LiteralText);
+                }
+                return String.Join(String.Empty, s.ToArray());
+            }
+        }
+
+        public override string ToString() {
+            List<string> s = new List<string>();
+            foreach (PathSubsegment subsegment in Subsegments) {
+                s.Add(subsegment.ToString());
+            }
+            return "[ " + String.Join(", ", s.ToArray()) + " ]";
+        }
+#endif
+    }
+}

mcs/class/referencesource/System.Web/Routing/HttpMethodConstraint.cs

@@ -0,0 +1,83 @@
+namespace System.Web.Routing {
+    using System;
+    using System.Collections.Generic;
+    using System.Globalization;
+    using System.Linq;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class HttpMethodConstraint : IRouteConstraint {
+
+        public HttpMethodConstraint(params string[] allowedMethods) {
+            if (allowedMethods == null) {
+                throw new ArgumentNullException("allowedMethods");
+            }
+
+            AllowedMethods = allowedMethods.ToList().AsReadOnly();
+        }
+
+        public ICollection<string> AllowedMethods {
+            get;
+            private set;
+        }
+
+        protected virtual bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection) {
+            if (httpContext == null) {
+                throw new ArgumentNullException("httpContext");
+            }
+            if (route == null) {
+                throw new ArgumentNullException("route");
+            }
+            if (parameterName == null) {
+                throw new ArgumentNullException("parameterName");
+            }
+            if (values == null) {
+                throw new ArgumentNullException("values");
+            }
+
+            switch (routeDirection) {
+                case RouteDirection.IncomingRequest:
+                    return AllowedMethods.Any(method => String.Equals(method, httpContext.Request.HttpMethod,
+                        StringComparison.OrdinalIgnoreCase));
+
+                case RouteDirection.UrlGeneration:
+                    // We need to see if the user specified the HTTP method explicitly.  Consider these two routes:
+                    //
+                    // a) Route: Url = "/{foo}", Constraints = { httpMethod = new HttpMethodConstraint("GET") }
+                    // b) Route: Url = "/{foo}", Constraints = { httpMethod = new HttpMethodConstraint("POST") }
+                    //
+                    // A user might know ahead of time that a URL he is generating might be used with a particular HTTP
+                    // method.  If a URL will be used for an HTTP POST but we match on (a) while generating the URL, then
+                    // the HTTP GET-specific route will be used for URL generation, which might have undesired behavior.
+                    // To prevent this, a user might call RouteCollection.GetVirtualPath(..., { httpMethod = "POST" }) to
+                    // signal that he is generating a URL that will be used for an HTTP POST, so he wants the URL
+                    // generation to be performed by the (b) route instead of the (a) route, consistent with what would
+                    // happen on incoming requests.
+
+                    object parameterValue;
+                    if (!values.TryGetValue(parameterName, out parameterValue)) {
+                        return true;
+                    }
+
+                    string parameterValueString = parameterValue as string;
+                    if (parameterValueString == null) {
+                        throw new InvalidOperationException(String.Format(CultureInfo.CurrentUICulture,
+                            SR.GetString(SR.HttpMethodConstraint_ParameterValueMustBeString), parameterName, route.Url));
+                    }
+
+                    return AllowedMethods.Any(method => String.Equals(method, parameterValueString,
+                        StringComparison.OrdinalIgnoreCase));
+
+                default:
+                    return true;
+            }
+        }
+
+        #region IRouteConstraint Members
+        bool IRouteConstraint.Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection) {
+            return Match(httpContext, route, parameterName, values, routeDirection);
+        }
+        #endregion
+
+    }
+}

mcs/class/referencesource/System.Web/Routing/IRouteConstraint.cs

@@ -0,0 +1,9 @@
+namespace System.Web.Routing {
+    using System.Web;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public interface IRouteConstraint {
+        bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection);
+    }
+}

mcs/class/referencesource/System.Web/Routing/IRouteHandler.cs

@@ -0,0 +1,8 @@
+namespace System.Web.Routing {
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public interface IRouteHandler {
+        IHttpHandler GetHttpHandler(RequestContext requestContext);
+    }
+}

mcs/class/referencesource/System.Web/Routing/LiteralSubsegment.cs

@@ -0,0 +1,26 @@
+namespace System.Web.Routing {
+
+    // Represents a literal subsegment of a ContentPathSegment
+    internal sealed class LiteralSubsegment : PathSubsegment {
+        public LiteralSubsegment(string literal) {
+            Literal = literal;
+        }
+
+        public string Literal {
+            get;
+            private set;
+        }
+
+#if ROUTE_DEBUGGING
+        public override string LiteralText {
+            get {
+                return Literal;
+            }
+        }
+
+        public override string ToString() {
+            return "\"" + Literal + "\"";
+        }
+#endif
+    }
+}

mcs/class/referencesource/System.Web/Routing/PageRouteHandler.cs

@@ -0,0 +1,114 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebFormRouteHandler.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Routing {
+
+    using System;
+    using System.Web.UI;
+    using System.Web.Compilation;
+    using System.Web.Security;
+    using System.Security;
+    using System.Security.Permissions;
+    using System.Security.Principal;
+
+    public class PageRouteHandler : IRouteHandler {
+        public PageRouteHandler(string virtualPath)
+            : this(virtualPath, true) {
+        }
+
+        public PageRouteHandler(string virtualPath, bool checkPhysicalUrlAccess) {
+            if (string.IsNullOrEmpty(virtualPath) || !virtualPath.StartsWith("~/", StringComparison.OrdinalIgnoreCase)) {
+                throw new ArgumentException(SR.GetString(SR.PageRouteHandler_InvalidVirtualPath), "virtualPath");
+            }
+
+            this.VirtualPath = virtualPath;
+            this.CheckPhysicalUrlAccess = checkPhysicalUrlAccess;
+            _useRouteVirtualPath = VirtualPath.Contains("{");
+        }
+
+        /// <summary>
+        /// This is the full virtual path (using tilde syntax) to the WebForm page.
+        /// </summary>
+        /// <remarks>
+        /// Needs to be thread safe so this is only settable via ctor.
+        /// </remarks>
+        public string VirtualPath { get; private set; }
+
+        /// <summary>
+        /// Because we're not actually rewriting the URL, ASP.NET's URL Auth will apply 
+        /// to the incoming request URL and not the URL of the physical WebForm page.
+        /// Setting this to true (default) will apply URL access rules against the 
+        /// physical file.
+        /// </summary>
+        /// <value>True by default</value>
+        public bool CheckPhysicalUrlAccess { get; private set; }
+
+        private bool _useRouteVirtualPath;
+        private Route _routeVirtualPath;
+        private Route RouteVirtualPath {
+            get {
+                if (_routeVirtualPath == null) {
+                    //Trim off ~/
+                    _routeVirtualPath = new Route(VirtualPath.Substring(2), this);
+                }
+                return _routeVirtualPath;
+            }
+        }
+
+        private bool CheckUrlAccess(string virtualPath, RequestContext requestContext) {
+            IPrincipal user = requestContext.HttpContext.User;
+            // If there's no authenticated user, use the default identity
+            if (user == null) {
+                user = new GenericPrincipal(new GenericIdentity(String.Empty, String.Empty), new string[0]);
+            }
+            return CheckUrlAccessWithAssert(virtualPath, requestContext, user);
+        }
+
+        [SecurityPermission(SecurityAction.Assert, Unrestricted = true)]
+        private bool CheckUrlAccessWithAssert(string virtualPath, RequestContext requestContext, IPrincipal user) {
+            return UrlAuthorizationModule.CheckUrlAccessForPrincipal(virtualPath, user, requestContext.HttpContext.Request.HttpMethod);
+        }
+
+        public virtual IHttpHandler GetHttpHandler(RequestContext requestContext) {
+            if (requestContext == null) {
+                throw new ArgumentNullException("requestContext");
+            }
+
+            string virtualPath = GetSubstitutedVirtualPath(requestContext);
+            // Virtual Path ----s up with query strings, so we need to strip them off
+            int qmark = virtualPath.IndexOf('?');
+            if (qmark != -1) {
+                virtualPath = virtualPath.Substring(0, qmark);
+            }
+            if (this.CheckPhysicalUrlAccess && !CheckUrlAccess(virtualPath, requestContext)) {
+                return new UrlAuthFailureHandler();
+            }
+
+            Page page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof(Page)) as Page;
+            return page;
+        }
+
+        /// <summary>
+        /// Gets the virtual path to the resource after applying substitutions based on route data.
+        /// </summary>
+        /// <param name="requestContext"></param>
+        /// <returns></returns>
+        public string GetSubstitutedVirtualPath(RequestContext requestContext) {
+            if (requestContext == null) {
+                throw new ArgumentNullException("requestContext");
+            }
+
+            if (!_useRouteVirtualPath)
+                return VirtualPath;
+
+            VirtualPathData vpd = RouteVirtualPath.GetVirtualPath(requestContext, requestContext.RouteData.Values);
+            // 
+            if (vpd == null)
+                return VirtualPath;
+            return "~/" + vpd.VirtualPath;
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/ParameterSubsegment.cs

@@ -0,0 +1,37 @@
+namespace System.Web.Routing {
+
+    // Represents a parameter subsegment of a ContentPathSegment
+    internal sealed class ParameterSubsegment : PathSubsegment {
+        public ParameterSubsegment(string parameterName) {
+            if (parameterName.StartsWith("*", StringComparison.Ordinal)) {
+                ParameterName = parameterName.Substring(1);
+                IsCatchAll = true;
+            }
+            else {
+                ParameterName = parameterName;
+            }
+        }
+
+        public bool IsCatchAll {
+            get;
+            private set;
+        }
+
+        public string ParameterName {
+            get;
+            private set;
+        }
+
+#if ROUTE_DEBUGGING
+        public override string LiteralText {
+            get {
+                return "{" + (IsCatchAll ? "*" : String.Empty) + ParameterName + "}";
+            }
+        }
+
+        public override string ToString() {
+            return "{" + (IsCatchAll ? "*" : String.Empty) + ParameterName + "}";
+        }
+#endif
+    }
+}

mcs/class/referencesource/System.Web/Routing/PathSegment.cs

@@ -0,0 +1,11 @@
+namespace System.Web.Routing {
+
+    // Represents a segment of a URL such as a separator or content
+    internal abstract class PathSegment {
+#if ROUTE_DEBUGGING
+        public abstract string LiteralText {
+            get;
+        }
+#endif
+    }
+}

mcs/class/referencesource/System.Web/Routing/PathSubsegment.cs

@@ -0,0 +1,11 @@
+namespace System.Web.Routing {
+
+    // Represents a subsegment of a ContentPathSegment such as a parameter or a literal.
+    internal abstract class PathSubsegment {
+#if ROUTE_DEBUGGING
+        public abstract string LiteralText {
+            get;
+        }
+#endif
+    }
+}

mcs/class/referencesource/System.Web/Routing/RequestContext.cs

@@ -0,0 +1,33 @@
+namespace System.Web.Routing {
+    using System.Runtime.CompilerServices;
+    using System.Diagnostics.CodeAnalysis;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class RequestContext {
+        public RequestContext() {
+        }
+
+        [SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors",
+            Justification = "The virtual property setters are only to support mocking frameworks, in which case this constructor shouldn't be called anyway.")]
+        public RequestContext(HttpContextBase httpContext, RouteData routeData) {
+            if (httpContext == null) {
+                throw new ArgumentNullException("httpContext");
+            }
+            if (routeData == null) {
+                throw new ArgumentNullException("routeData");
+            }
+            HttpContext = httpContext;
+            RouteData = routeData;
+        }
+
+        public virtual HttpContextBase HttpContext {
+            get;
+            set;
+        }
+
+        public virtual RouteData RouteData {
+            get;
+            set;
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/Route.cs

@@ -0,0 +1,186 @@
+namespace System.Web.Routing {
+    using System;
+    using System.Globalization;
+    using System.Text.RegularExpressions;
+    using System.Web;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class Route : RouteBase {
+        private const string HttpMethodParameterName = "httpMethod";
+
+        private string _url;
+        private ParsedRoute _parsedRoute;
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "This is a URL template with special characters, not just a regular valid URL.")]
+        public Route(string url, IRouteHandler routeHandler) {
+            Url = url;
+            RouteHandler = routeHandler;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "This is a URL template with special characters, not just a regular valid URL.")]
+        public Route(string url, RouteValueDictionary defaults, IRouteHandler routeHandler) {
+            Url = url;
+            Defaults = defaults;
+            RouteHandler = routeHandler;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "This is a URL template with special characters, not just a regular valid URL.")]
+        public Route(string url, RouteValueDictionary defaults, RouteValueDictionary constraints, IRouteHandler routeHandler) {
+            Url = url;
+            Defaults = defaults;
+            Constraints = constraints;
+            RouteHandler = routeHandler;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "This is a URL template with special characters, not just a regular valid URL.")]
+        public Route(string url, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary dataTokens, IRouteHandler routeHandler) {
+            Url = url;
+            Defaults = defaults;
+            Constraints = constraints;
+            DataTokens = dataTokens;
+            RouteHandler = routeHandler;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly",
+            Justification = "This property is settable so people can use object initializers.")]
+        public RouteValueDictionary Constraints {
+            get;
+            set;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly",
+            Justification = "This property is settable so people can use object initializers.")]
+        public RouteValueDictionary DataTokens {
+            get;
+            set;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly",
+            Justification = "This property is settable so people can use object initializers.")]
+        public RouteValueDictionary Defaults {
+            get;
+            set;
+        }
+
+        public IRouteHandler RouteHandler {
+            get;
+            set;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings",
+            Justification = "This is a URL template with special characters, not just a regular valid URL.")]
+        public string Url {
+            get {
+                return _url ?? String.Empty;
+            }
+            set {
+                // The parser will throw for invalid routes. We don't have to worry
+                // about _parsedRoute getting out of [....] with _url since the latter
+                // won't get set unless we can parse the route.
+                _parsedRoute = RouteParser.Parse(value);
+
+                // If we passed the parsing stage, save the original URL value
+                _url = value;
+            }
+        }
+
+        public override RouteData GetRouteData(HttpContextBase httpContext) {
+            // Parse incoming URL (we trim off the first two chars since they're always "~/")
+            string requestPath = httpContext.Request.AppRelativeCurrentExecutionFilePath.Substring(2) + httpContext.Request.PathInfo;
+
+            RouteValueDictionary values = _parsedRoute.Match(requestPath, Defaults);
+
+            if (values == null) {
+                // If we got back a null value set, that means the URL did not match
+                return null;
+            }
+
+            RouteData routeData = new RouteData(this, RouteHandler);
+
+            // Validate the values
+            if (!ProcessConstraints(httpContext, values, RouteDirection.IncomingRequest)) {
+                return null;
+            }
+
+            // Copy the matched values
+            foreach (var value in values) {
+                routeData.Values.Add(value.Key, value.Value);
+            }
+
+            // Copy the DataTokens from the Route to the RouteData
+            if (DataTokens != null) {
+                foreach (var prop in DataTokens) {
+                    routeData.DataTokens[prop.Key] = prop.Value;
+                }
+            }
+
+            return routeData;
+        }
+
+        public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values) {
+            // Try to generate a URL that represents the values passed in based on current
+            // values from the RouteData and new values using the specified Route.
+
+            BoundUrl result = _parsedRoute.Bind(requestContext.RouteData.Values, values, Defaults, Constraints);
+
+            if (result == null) {
+                return null;
+            }
+
+            // Verify that the route matches the validation rules
+            if (!ProcessConstraints(requestContext.HttpContext, result.Values, RouteDirection.UrlGeneration)) {
+                return null;
+            }
+
+            VirtualPathData vpd = new VirtualPathData(this, result.Url);
+
+            // Add the DataTokens from the Route to the VirtualPathData
+            if (DataTokens != null) {
+                foreach (var prop in DataTokens) {
+                    vpd.DataTokens[prop.Key] = prop.Value;
+                }
+            }
+            return vpd;
+        }
+
+        protected virtual bool ProcessConstraint(HttpContextBase httpContext, object constraint, string parameterName, RouteValueDictionary values, RouteDirection routeDirection) {
+            IRouteConstraint customConstraint = constraint as IRouteConstraint;
+            if (customConstraint != null) {
+                return customConstraint.Match(httpContext, this, parameterName, values, routeDirection);
+            }
+
+            // If there was no custom constraint, then treat the constraint as a string which represents a Regex.
+            string constraintsRule = constraint as string;
+            if (constraintsRule == null) {
+                throw new InvalidOperationException(String.Format(
+                    CultureInfo.CurrentUICulture,
+                    SR.GetString(SR.Route_ValidationMustBeStringOrCustomConstraint),
+                    parameterName,
+                    Url));
+            }
+
+            object parameterValue;
+            values.TryGetValue(parameterName, out parameterValue);
+            string parameterValueString = Convert.ToString(parameterValue, CultureInfo.InvariantCulture);
+            string constraintsRegEx = "^(" + constraintsRule + ")$";
+            return Regex.IsMatch(parameterValueString, constraintsRegEx,
+                RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
+        }
+
+        private bool ProcessConstraints(HttpContextBase httpContext, RouteValueDictionary values, RouteDirection routeDirection) {
+            if (Constraints != null) {
+                foreach (var constraintsItem in Constraints) {
+                    if (!ProcessConstraint(httpContext, constraintsItem.Value, constraintsItem.Key, values, routeDirection)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteBase.cs

@@ -0,0 +1,21 @@
+namespace System.Web.Routing {
+    using System.Collections.Generic;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public abstract class RouteBase {
+        public abstract RouteData GetRouteData(HttpContextBase httpContext);
+        public abstract VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values);
+
+        // Default needs to be true to avoid breaking change
+        private bool _routeExistingFiles = true;
+        public bool RouteExistingFiles {
+            get {
+                return _routeExistingFiles;
+            }
+            set {
+                _routeExistingFiles = value;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteCollection.cs

@@ -0,0 +1,405 @@
+namespace System.Web.Routing {
+    using System.Collections.Generic;
+    using System.Collections.ObjectModel;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Globalization;
+    using System.Runtime.CompilerServices;
+    using System.Threading;
+    using System.Web.Hosting;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class RouteCollection : Collection<RouteBase> {
+        private Dictionary<string, RouteBase> _namedMap = new Dictionary<string, RouteBase>(StringComparer.OrdinalIgnoreCase);
+        private VirtualPathProvider _vpp;
+
+        private ReaderWriterLockSlim _rwLock = new ReaderWriterLockSlim();
+
+        public RouteCollection() {
+        }
+
+        public RouteCollection(VirtualPathProvider virtualPathProvider) {
+            VPP = virtualPathProvider;
+        }
+
+        public bool AppendTrailingSlash {
+            get;
+            set;
+        }
+
+        public bool LowercaseUrls {
+            get;
+            set;
+        }
+
+        public bool RouteExistingFiles {
+            get;
+            set;
+        }
+
+        private VirtualPathProvider VPP {
+            get {
+                if (_vpp == null) {
+                    return HostingEnvironment.VirtualPathProvider;
+                }
+                return _vpp;
+            }
+            set {
+                _vpp = value;
+            }
+        }
+
+        public RouteBase this[string name] {
+            get {
+                if (String.IsNullOrEmpty(name)) {
+                    return null;
+                }
+                RouteBase route;
+                if (_namedMap.TryGetValue(name, out route)) {
+                    return route;
+                }
+                return null;
+            }
+        }
+
+        public void Add(string name, RouteBase item) {
+            if (item == null) {
+                throw new ArgumentNullException("item");
+            }
+
+            if (!String.IsNullOrEmpty(name)) {
+                if (_namedMap.ContainsKey(name)) {
+                    throw new ArgumentException(
+                        String.Format(
+                            CultureInfo.CurrentUICulture,
+                            SR.GetString(SR.RouteCollection_DuplicateName),
+                            name),
+                        "name");
+                }
+            }
+
+            Add(item);
+            if (!String.IsNullOrEmpty(name)) {
+                _namedMap[name] = item;
+            }
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "Warning was suppressed for consistency with existing similar routing API")]
+        public Route MapPageRoute(string routeName, string routeUrl, string physicalFile) {
+            return MapPageRoute(routeName, routeUrl, physicalFile, true /* checkPhysicalUrlAccess */, null, null, null);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "Warning was suppressed for consistency with existing similar routing API")]
+        public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess) {
+            return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, null, null, null);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "Warning was suppressed for consistency with existing similar routing API")]
+        public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults) {
+            return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, defaults, null, null);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "Warning was suppressed for consistency with existing similar routing API")]
+        public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults, RouteValueDictionary constraints) {
+            return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, defaults, constraints, null);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings",
+            Justification = "Warning was suppressed for consistency with existing similar routing API")]
+        public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary dataTokens) {
+            if (routeUrl == null) {
+                throw new ArgumentNullException("routeUrl");
+            }
+            Route route = new Route(routeUrl, defaults, constraints, dataTokens, new PageRouteHandler(physicalFile, checkPhysicalUrlAccess));
+            Add(routeName, route);
+            return route;
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        protected override void ClearItems() {
+            _namedMap.Clear();
+            base.ClearItems();
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "Not worth a breaking change.")]
+        public IDisposable GetReadLock() {
+            _rwLock.EnterReadLock();
+            return new ReadLockDisposable(_rwLock);
+        }
+
+        private RequestContext GetRequestContext(RequestContext requestContext) {
+            if (requestContext != null) {
+                return requestContext;
+            }
+            HttpContext httpContext = HttpContext.Current;
+            if (httpContext == null) {
+                throw new InvalidOperationException(SR.GetString(SR.RouteCollection_RequiresContext));
+            }
+            return new RequestContext(new HttpContextWrapper(httpContext), new RouteData());
+        }
+
+        // Returns true if this is a request to an existing file
+        private bool IsRouteToExistingFile(HttpContextBase httpContext) {
+            string requestPath = httpContext.Request.AppRelativeCurrentExecutionFilePath;
+            return ((requestPath != "~/") &&
+                (VPP != null) &&
+                (VPP.FileExists(requestPath) ||
+                VPP.DirectoryExists(requestPath)));
+        }
+
+        public RouteData GetRouteData(HttpContextBase httpContext) {
+            if (httpContext == null) {
+                throw new ArgumentNullException("httpContext");
+            }
+            if (httpContext.Request == null) {
+                throw new ArgumentException(SR.GetString(SR.RouteTable_ContextMissingRequest), "httpContext");
+            }
+
+            // Optimize performance when the route collection is empty.  The main improvement is that we avoid taking
+            // a read lock when the collection is empty.  Without this check, the UrlRoutingModule causes a 25%-50%
+            // regression in HelloWorld RPS due to lock contention.  The UrlRoutingModule is now in the root web.config,
+            // so we need to ensure the module is performant, especially when you are not using routing.
+            // This check does introduce a slight bug, in that if a writer clears the collection as part of a write
+            // transaction, a reader may see the collection when it's empty, which the read lock is supposed to prevent.
+            // We will investigate a better fix in Dev10 Beta2.  The Beta1 bug is Dev10 652986.
+            if (Count == 0) {
+                return null;
+            }
+
+            bool isRouteToExistingFile = false;
+            bool doneRouteCheck = false; // We only want to do the route check once
+            if (!RouteExistingFiles) {
+                isRouteToExistingFile = IsRouteToExistingFile(httpContext);
+                doneRouteCheck = true;
+                if (isRouteToExistingFile) {
+                    // If we're not routing existing files and the file exists, we stop processing routes
+                    return null;
+                }
+            }
+
+            // Go through all the configured routes and find the first one that returns a match
+            using (GetReadLock()) {
+                foreach (RouteBase route in this) {
+                    RouteData routeData = route.GetRouteData(httpContext);
+                    if (routeData != null) {
+                        // If we're not routing existing files on this route and the file exists, we also stop processing routes
+                        if (!route.RouteExistingFiles) {
+                            if (!doneRouteCheck) {
+                                isRouteToExistingFile = IsRouteToExistingFile(httpContext);
+                                doneRouteCheck = true;
+                            }
+                            if (isRouteToExistingFile) {
+                                return null;
+                            }
+                        }
+                        return routeData;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+
+        [SuppressMessage("Microsoft.Globalization", "CA1307:SpecifyStringComparison", MessageId = "System.String.EndsWith(System.String)", Justification = @"okay")]
+        private string NormalizeVirtualPath(RequestContext requestContext, string virtualPath) {
+            string url = System.Web.UI.Util.GetUrlWithApplicationPath(requestContext.HttpContext, virtualPath);
+
+            if (LowercaseUrls || AppendTrailingSlash) {
+                int iqs = url.IndexOfAny(new char[] { '?', '#' });
+                string urlWithoutQs;
+                string qs;
+                if (iqs >= 0) {
+                    urlWithoutQs = url.Substring(0, iqs);
+                    qs = url.Substring(iqs);
+                }
+                else {
+                    urlWithoutQs = url;
+                    qs = "";
+                }
+
+                // Don't lowercase the query string
+                if (LowercaseUrls) {
+                    urlWithoutQs = urlWithoutQs.ToLowerInvariant();
+                }
+
+                if (AppendTrailingSlash && !urlWithoutQs.EndsWith("/")) {
+                    urlWithoutQs += "/";
+                }
+
+                url = urlWithoutQs + qs;
+            }
+
+            return url;
+        }
+
+        public VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values) {
+            requestContext = GetRequestContext(requestContext);
+
+            // Go through all the configured routes and find the first one that returns a match
+            using (GetReadLock()) {
+                foreach (RouteBase route in this) {
+                    VirtualPathData vpd = route.GetVirtualPath(requestContext, values);
+                    if (vpd != null) {
+                        vpd.VirtualPath = NormalizeVirtualPath(requestContext, vpd.VirtualPath);
+                        return vpd;
+                    }
+                }
+            }
+
+            return null;
+        }
+
+        public VirtualPathData GetVirtualPath(RequestContext requestContext, string name, RouteValueDictionary values) {
+            requestContext = GetRequestContext(requestContext);
+
+            if (!String.IsNullOrEmpty(name)) {
+                RouteBase namedRoute;
+                bool routeFound;
+                using (GetReadLock()) {
+                    routeFound = _namedMap.TryGetValue(name, out namedRoute);
+                }
+                if (routeFound) {
+                    VirtualPathData vpd = namedRoute.GetVirtualPath(requestContext, values);
+                    if (vpd != null) {
+                        vpd.VirtualPath = NormalizeVirtualPath(requestContext, vpd.VirtualPath);
+                        return vpd;
+                    }
+                    return null;
+                }
+                else {
+                    throw new ArgumentException(
+                        String.Format(
+                            CultureInfo.CurrentUICulture,
+                            SR.GetString(SR.RouteCollection_NameNotFound),
+                            name),
+                        "name");
+                }
+            }
+            else {
+                return GetVirtualPath(requestContext, values);
+            }
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "Not worth a breaking change.")]
+        public IDisposable GetWriteLock() {
+            _rwLock.EnterWriteLock();
+            return new WriteLockDisposable(_rwLock);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", 
+            Justification = "This is not a regular URL as it may contain special routing characters.")]
+        public void Ignore(string url) {
+            Ignore(url, null /* constraints */);
+        }
+
+        [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", 
+            Justification = "This is not a regular URL as it may contain special routing characters.")]
+        public void Ignore(string url, object constraints) {
+            if (url == null) {
+                throw new ArgumentNullException("url");
+            }
+
+            IgnoreRouteInternal route = new IgnoreRouteInternal(url) {
+                Constraints = new RouteValueDictionary(constraints)
+            };
+
+            Add(route);
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        protected override void InsertItem(int index, RouteBase item) {
+            if (item == null) {
+                throw new ArgumentNullException("item");
+            }
+
+            if (Contains(item)) {
+                throw new ArgumentException(
+                    String.Format(
+                        CultureInfo.CurrentCulture,
+                        SR.GetString(SR.RouteCollection_DuplicateEntry)),
+                    "item");
+            }
+            base.InsertItem(index, item);
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        protected override void RemoveItem(int index) {
+            RemoveRouteName(index);
+            base.RemoveItem(index);
+        }
+
+        private void RemoveRouteName(int index) {
+            // Search for the specified route and clear out its name if we have one
+            RouteBase route = this[index];
+            foreach (KeyValuePair<string, RouteBase> namedRoute in _namedMap) {
+                if (namedRoute.Value == route) {
+                    _namedMap.Remove(namedRoute.Key);
+                    break;
+                }
+            }
+        }
+
+        [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        protected override void SetItem(int index, RouteBase item) {
+            if (item == null) {
+                throw new ArgumentNullException("item");
+            }
+
+            if (Contains(item)) {
+                throw new ArgumentException(
+                    String.Format(
+                        CultureInfo.CurrentCulture,
+                        SR.GetString(SR.RouteCollection_DuplicateEntry)),
+                    "item");
+            }
+            RemoveRouteName(index);
+            base.SetItem(index, item);
+        }
+
+        private class ReadLockDisposable : IDisposable {
+
+            private ReaderWriterLockSlim _rwLock;
+
+            public ReadLockDisposable(ReaderWriterLockSlim rwLock) {
+                _rwLock = rwLock;
+            }
+
+            [SuppressMessage("Microsoft.Usage", "CA1816:CallGCSuppressFinalizeCorrectly",
+                Justification = "Type does not have a finalizer.")]
+            void IDisposable.Dispose() {
+                _rwLock.ExitReadLock();
+            }
+        }
+
+        private class WriteLockDisposable : IDisposable {
+
+            private ReaderWriterLockSlim _rwLock;
+
+            public WriteLockDisposable(ReaderWriterLockSlim rwLock) {
+                _rwLock = rwLock;
+            }
+
+            [SuppressMessage("Microsoft.Usage", "CA1816:CallGCSuppressFinalizeCorrectly",
+                Justification = "Type does not have a finalizer.")]
+            void IDisposable.Dispose() {
+                _rwLock.ExitWriteLock();
+            }
+        }
+
+        private sealed class IgnoreRouteInternal : Route {
+            public IgnoreRouteInternal(string url)
+                : base(url, new StopRoutingHandler()) {
+            }
+
+            public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary routeValues) {
+                // Never match during route generation. This avoids the scenario where an IgnoreRoute with
+                // fairly relaxed constraints ends up eagerly matching all generated URLs.
+                return null;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteData.cs

@@ -0,0 +1,62 @@
+namespace System.Web.Routing {
+    using System;
+    using System.Collections.Generic;
+    using System.Globalization;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class RouteData {
+        private IRouteHandler _routeHandler;
+        private RouteValueDictionary _values = new RouteValueDictionary();
+        private RouteValueDictionary _dataTokens = new RouteValueDictionary();
+
+        public RouteData() {
+        }
+
+        public RouteData(RouteBase route, IRouteHandler routeHandler) {
+            Route = route;
+            RouteHandler = routeHandler;
+        }
+
+        public RouteValueDictionary DataTokens {
+            get {
+                return _dataTokens;
+            }
+        }
+
+        public RouteBase Route {
+            get;
+            set;
+        }
+
+        public IRouteHandler RouteHandler {
+            get {
+                return _routeHandler;
+            }
+            set {
+                _routeHandler = value;
+            }
+        }
+
+        public RouteValueDictionary Values {
+            get {
+                return _values;
+            }
+        }
+
+        public string GetRequiredString(string valueName) {
+            object value;
+            if (Values.TryGetValue(valueName, out value)) {
+                string valueString = value as string;
+                if (!String.IsNullOrEmpty(valueString)) {
+                    return valueString;
+                }
+            }
+            throw new InvalidOperationException(
+                String.Format(
+                    CultureInfo.CurrentUICulture,
+                    SR.GetString(SR.RouteData_RequiredValue),
+                    valueName));
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteDirection.cs

@@ -0,0 +1,9 @@
+namespace System.Web.Routing {
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public enum RouteDirection {
+        IncomingRequest,
+        UrlGeneration
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteParser.cs

@@ -0,0 +1,339 @@
+namespace System.Web.Routing {
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.Globalization;
+    using System.Linq;
+
+    internal static class RouteParser {
+        private static string GetLiteral(string segmentLiteral) {
+            // Scan for errant single { and } and convert double {{ to { and double }} to }
+
+            // First we eliminate all escaped braces and then check if any other braces are remaining
+            string newLiteral = segmentLiteral.Replace("{{", "").Replace("}}", "");
+            if (newLiteral.Contains("{") || newLiteral.Contains("}")) {
+                return null;
+            }
+
+            // If it's a valid format, we unescape the braces
+            return segmentLiteral.Replace("{{", "{").Replace("}}", "}");
+        }
+
+        private static int IndexOfFirstOpenParameter(string segment, int startIndex) {
+            // Find the first unescaped open brace
+            while (true) {
+                startIndex = segment.IndexOf('{', startIndex);
+                if (startIndex == -1) {
+                    // If there are no more open braces, stop
+                    return -1;
+                }
+                if ((startIndex + 1 == segment.Length) ||
+                    ((startIndex + 1 < segment.Length) && (segment[startIndex + 1] != '{'))) {
+                    // If we found an open brace that is followed by a non-open brace, it's
+                    // a parameter delimiter.
+                    // It's also a delimiter if the open brace is the last character - though
+                    // it ends up being being called out as invalid later on.
+                    return startIndex;
+                }
+                // Increment by two since we want to skip both the open brace that
+                // we're on as well as the subsequent character since we know for
+                // sure that it is part of an escape sequence.
+                startIndex += 2;
+            }
+        }
+
+        internal static bool IsSeparator(string s) {
+            return String.Equals(s, "/", StringComparison.Ordinal);
+        }
+
+        private static bool IsValidParameterName(string parameterName) {
+            if (parameterName.Length == 0) {
+                return false;
+            }
+
+            for (int i = 0; i < parameterName.Length; i++) {
+                char c = parameterName[i];
+                if (c == '/' || c == '{' || c == '}') {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        internal static bool IsInvalidRouteUrl(string routeUrl) {
+            return (routeUrl.StartsWith("~", StringComparison.Ordinal) ||
+                routeUrl.StartsWith("/", StringComparison.Ordinal) ||
+                (routeUrl.IndexOf('?') != -1));
+        }
+
+        public static ParsedRoute Parse(string routeUrl) {
+            if (routeUrl == null) {
+                routeUrl = String.Empty;
+            }
+
+            if (IsInvalidRouteUrl(routeUrl)) {
+                throw new ArgumentException(SR.GetString(SR.Route_InvalidRouteUrl), "routeUrl");
+            }
+
+            IList<string> urlParts = SplitUrlToPathSegmentStrings(routeUrl);
+            Exception ex = ValidateUrlParts(urlParts);
+            if (ex != null) {
+                throw ex;
+            }
+
+            IList<PathSegment> pathSegments = SplitUrlToPathSegments(urlParts);
+
+            Debug.Assert(urlParts.Count == pathSegments.Count, "The number of string segments should be the same as the number of path segments");
+
+            return new ParsedRoute(pathSegments);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly",
+            Justification = "The exceptions are just constructed here, but they are thrown from a method that does have those parameter names.")]
+        private static IList<PathSubsegment> ParseUrlSegment(string segment, out Exception exception) {
+            int startIndex = 0;
+
+            List<PathSubsegment> pathSubsegments = new List<PathSubsegment>();
+
+            while (startIndex < segment.Length) {
+                int nextParameterStart = IndexOfFirstOpenParameter(segment, startIndex);
+                if (nextParameterStart == -1) {
+                    // If there are no more parameters in the segment, capture the remainder as a literal and stop
+                    string lastLiteralPart = GetLiteral(segment.Substring(startIndex));
+                    if (lastLiteralPart == null) {
+                        exception = new ArgumentException(
+                            String.Format(
+                                CultureInfo.CurrentUICulture,
+                                SR.GetString(SR.Route_MismatchedParameter),
+                                segment
+                            ),
+                            "routeUrl");
+                        return null;
+                    }
+                    if (lastLiteralPart.Length > 0) {
+                        pathSubsegments.Add(new LiteralSubsegment(lastLiteralPart));
+                    }
+                    break;
+                }
+
+                int nextParameterEnd = segment.IndexOf('}', nextParameterStart + 1);
+                if (nextParameterEnd == -1) {
+                    exception = new ArgumentException(
+                        String.Format(
+                            CultureInfo.CurrentUICulture,
+                            SR.GetString(SR.Route_MismatchedParameter),
+                            segment
+                        ),
+                        "routeUrl");
+                    return null;
+                }
+
+                string literalPart = GetLiteral(segment.Substring(startIndex, nextParameterStart - startIndex));
+                if (literalPart == null) {
+                    exception = new ArgumentException(
+                        String.Format(
+                            CultureInfo.CurrentUICulture,
+                            SR.GetString(SR.Route_MismatchedParameter),
+                            segment
+                        ),
+                        "routeUrl");
+                    return null;
+                }
+                if (literalPart.Length > 0) {
+                    pathSubsegments.Add(new LiteralSubsegment(literalPart));
+                }
+
+                string parameterName = segment.Substring(nextParameterStart + 1, nextParameterEnd - nextParameterStart - 1);
+                pathSubsegments.Add(new ParameterSubsegment(parameterName));
+
+                startIndex = nextParameterEnd + 1;
+            }
+
+            exception = null;
+            return pathSubsegments;
+        }
+
+        private static IList<PathSegment> SplitUrlToPathSegments(IList<string> urlParts) {
+            List<PathSegment> pathSegments = new List<PathSegment>();
+
+            foreach (string pathSegment in urlParts) {
+                bool isCurrentPartSeparator = IsSeparator(pathSegment);
+                if (isCurrentPartSeparator) {
+                    pathSegments.Add(new SeparatorPathSegment());
+                }
+                else {
+                    Exception exception;
+                    IList<PathSubsegment> subsegments = ParseUrlSegment(pathSegment, out exception);
+                    Debug.Assert(exception == null, "This only gets called after the path has been validated, so there should never be an exception here");
+                    pathSegments.Add(new ContentPathSegment(subsegments));
+                }
+            }
+            return pathSegments;
+        }
+
+        internal static IList<string> SplitUrlToPathSegmentStrings(string url) {
+            List<string> parts = new List<string>();
+
+            if (String.IsNullOrEmpty(url)) {
+                return parts;
+            }
+
+            int currentIndex = 0;
+
+            // Split the incoming URL into individual parts
+            while (currentIndex < url.Length) {
+                int indexOfNextSeparator = url.IndexOf('/', currentIndex);
+                if (indexOfNextSeparator == -1) {
+                    // If there are no more separators, the rest of the string is the last part
+                    string finalPart = url.Substring(currentIndex);
+                    if (finalPart.Length > 0) {
+                        parts.Add(finalPart);
+                    }
+                    break;
+                }
+
+                string nextPart = url.Substring(currentIndex, indexOfNextSeparator - currentIndex);
+                if (nextPart.Length > 0) {
+                    parts.Add(nextPart);
+                }
+                Debug.Assert(url[indexOfNextSeparator] == '/', "The separator char itself should always be a '/'.");
+                parts.Add("/");
+                currentIndex = indexOfNextSeparator + 1;
+            }
+
+            return parts;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly",
+            Justification = "The exceptions are just constructed here, but they are thrown from a method that does have those parameter names.")]
+        private static Exception ValidateUrlParts(IList<string> pathSegments) {
+            Debug.Assert(pathSegments != null, "The value should always come from SplitUrl(), and that function should never return null.");
+
+            HashSet<string> usedParameterNames = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+            bool? isPreviousPartSeparator = null;
+
+            bool foundCatchAllParameter = false;
+
+            foreach (string pathSegment in pathSegments) {
+                if (foundCatchAllParameter) {
+                    // If we ever start an iteration of the loop and we've already found a
+                    // catchall parameter then we have an invalid URL format.
+                    return new ArgumentException(
+                        String.Format(
+                            CultureInfo.CurrentCulture,
+                            SR.GetString(SR.Route_CatchAllMustBeLast)
+                        ),
+                        "routeUrl");
+                }
+
+                bool isCurrentPartSeparator;
+                if (isPreviousPartSeparator == null) {
+                    // Prime the loop with the first value
+                    isPreviousPartSeparator = IsSeparator(pathSegment);
+                    isCurrentPartSeparator = isPreviousPartSeparator.Value;
+                }
+                else {
+                    isCurrentPartSeparator = IsSeparator(pathSegment);
+
+                    // If both the previous part and the current part are separators, it's invalid
+                    if (isCurrentPartSeparator && isPreviousPartSeparator.Value) {
+                        return new ArgumentException(SR.GetString(SR.Route_CannotHaveConsecutiveSeparators), "routeUrl");
+                    }
+                    Debug.Assert(isCurrentPartSeparator != isPreviousPartSeparator.Value, "This assert should only happen if both the current and previous parts are non-separators. This should never happen because consecutive non-separators are always parsed as a single part.");
+                    isPreviousPartSeparator = isCurrentPartSeparator;
+                }
+
+                // If it's not a separator, parse the segment for parameters and validate it
+                if (!isCurrentPartSeparator) {
+                    Exception exception;
+                    IList<PathSubsegment> subsegments = ParseUrlSegment(pathSegment, out exception);
+                    if (exception != null) {
+                        return exception;
+                    }
+                    exception = ValidateUrlSegment(subsegments, usedParameterNames, pathSegment);
+                    if (exception != null) {
+                        return exception;
+                    }
+
+                    foundCatchAllParameter = subsegments.Any<PathSubsegment>(seg => (seg is ParameterSubsegment) && (((ParameterSubsegment)seg).IsCatchAll));
+                }
+            }
+            return null;
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2208:InstantiateArgumentExceptionsCorrectly",
+            Justification = "The exceptions are just constructed here, but they are thrown from a method that does have those parameter names.")]
+        private static Exception ValidateUrlSegment(IList<PathSubsegment> pathSubsegments, HashSet<string> usedParameterNames, string pathSegment) {
+            bool segmentContainsCatchAll = false;
+
+            Type previousSegmentType = null;
+
+            foreach (PathSubsegment subsegment in pathSubsegments) {
+                if (previousSegmentType != null) {
+                    if (previousSegmentType == subsegment.GetType()) {
+                        return new ArgumentException(
+                            String.Format(
+                                CultureInfo.CurrentCulture,
+                                SR.GetString(SR.Route_CannotHaveConsecutiveParameters)
+                            ),
+                            "routeUrl");
+                    }
+                }
+                previousSegmentType = subsegment.GetType();
+
+                LiteralSubsegment literalSubsegment = subsegment as LiteralSubsegment;
+                if (literalSubsegment != null) {
+                    // Nothing to validate for literals - everything is valid
+                }
+                else {
+                    ParameterSubsegment parameterSubsegment = subsegment as ParameterSubsegment;
+                    if (parameterSubsegment != null) {
+                        string parameterName = parameterSubsegment.ParameterName;
+
+                        if (parameterSubsegment.IsCatchAll) {
+                            segmentContainsCatchAll = true;
+                        }
+
+                        // Check for valid characters in the parameter name
+                        if (!IsValidParameterName(parameterName)) {
+                            return new ArgumentException(
+                                String.Format(
+                                    CultureInfo.CurrentUICulture,
+                                    SR.GetString(SR.Route_InvalidParameterName),
+                                    parameterName
+                                ),
+                                "routeUrl");
+                        }
+
+                        if (usedParameterNames.Contains(parameterName)) {
+                            return new ArgumentException(
+                                String.Format(
+                                    CultureInfo.CurrentUICulture,
+                                    SR.GetString(SR.Route_RepeatedParameter),
+                                    parameterName
+                                ),
+                                "routeUrl");
+                        }
+                        else {
+                            usedParameterNames.Add(parameterName);
+                        }
+                    }
+                    else {
+                        Debug.Fail("Invalid path subsegment type");
+                    }
+                }
+            }
+
+            if (segmentContainsCatchAll && (pathSubsegments.Count != 1)) {
+                return new ArgumentException(
+                    String.Format(
+                        CultureInfo.CurrentCulture,
+                        SR.GetString(SR.Route_CannotHaveCatchAllInMultiSegment)
+                    ),
+                    "routeUrl");
+            }
+
+            return null;
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteTable.cs

@@ -0,0 +1,16 @@
+namespace System.Web.Routing {
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1053:StaticHolderTypesShouldNotHaveConstructors",
+        Justification = "There is no explicit public constructor defined, and we don't want to add a private one.")]
+    public class RouteTable {
+        private static RouteCollection _instance = new RouteCollection();
+
+        public static RouteCollection Routes {
+            get {
+                return _instance;
+            }
+        }
+    }
+}

mcs/class/referencesource/System.Web/Routing/RouteValueDictionary.cs

@@ -0,0 +1,158 @@
+namespace System.Web.Routing {
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.ComponentModel;
+    using System.Runtime.CompilerServices;
+
+    [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")]
+    public class RouteValueDictionary : IDictionary<string, object> {
+        private Dictionary<string, object> _dictionary;
+
+        public RouteValueDictionary() {
+            _dictionary = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
+        }
+
+        public RouteValueDictionary(object values) {
+            _dictionary = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
+
+            AddValues(values);
+        }
+
+        public RouteValueDictionary(IDictionary<string, object> dictionary) {
+            _dictionary = new Dictionary<string, object>(dictionary, StringComparer.OrdinalIgnoreCase);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public int Count {
+            get {
+                return _dictionary.Count;
+            }
+        }
+
+        public Dictionary<string, object>.KeyCollection Keys {
+            get {
+                return _dictionary.Keys;
+            }
+        }
+
+        public Dictionary<string, object>.ValueCollection Values {
+            get {
+                return _dictionary.Values;
+            }
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public object this[string key] {
+            get {
+                object value;
+                TryGetValue(key, out value);
+                return value;
+            }
+            set {
+                _dictionary[key] = value;
+            }
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public void Add(string key, object value) {
+            _dictionary.Add(key, value);
+        }
+
+        private void AddValues(object values) {
+            if (values != null) {
+                PropertyDescriptorCollection props = TypeDescriptor.GetProperties(values);
+                foreach (PropertyDescriptor prop in props) {
+                    object val = prop.GetValue(values);
+                    Add(prop.Name, val);
+                }
+            }
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public void Clear() {
+            _dictionary.Clear();
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public bool ContainsKey(string key) {
+            return _dictionary.ContainsKey(key);
+        }
+
+        public bool ContainsValue(object value) {
+            return _dictionary.ContainsValue(value);
+        }
+
+        public Dictionary<string, object>.Enumerator GetEnumerator() {
+            return _dictionary.GetEnumerator();
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public bool Remove(string key) {
+            return _dictionary.Remove(key);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        public bool TryGetValue(string key, out object value) {
+            return _dictionary.TryGetValue(key, out value);
+        }
+
+        #region IDictionary<string,object> Members
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        ICollection<string> IDictionary<string, object>.Keys {
+            get {
+                return _dictionary.Keys;
+            }
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        ICollection<object> IDictionary<string, object>.Values {
+            get {
+                return _dictionary.Values;
+            }
+        }
+        #endregion
+
+        #region ICollection<KeyValuePair<string,object>> Members
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        void ICollection<KeyValuePair<string, object>>.Add(KeyValuePair<string, object> item) {
+            ((ICollection<KeyValuePair<string, object>>)_dictionary).Add(item);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        bool ICollection<KeyValuePair<string, object>>.Contains(KeyValuePair<string, object> item) {
+            return ((ICollection<KeyValuePair<string, object>>)_dictionary).Contains(item);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        void ICollection<KeyValuePair<string, object>>.CopyTo(KeyValuePair<string, object>[] array, int arrayIndex) {
+            ((ICollection<KeyValuePair<string, object>>)_dictionary).CopyTo(array, arrayIndex);
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        bool ICollection<KeyValuePair<string, object>>.IsReadOnly {
+            get {
+                return ((ICollection<KeyValuePair<string, object>>)_dictionary).IsReadOnly;
+            }
+        }
+
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        bool ICollection<KeyValuePair<string, object>>.Remove(KeyValuePair<string, object> item) {
+            return ((ICollection<KeyValuePair<string, object>>)_dictionary).Remove(item);
+        }
+        #endregion
+
+        #region IEnumerable<KeyValuePair<string,object>> Members
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        IEnumerator<KeyValuePair<string, object>> IEnumerable<KeyValuePair<string, object>>.GetEnumerator() {
+            return GetEnumerator();
+        }
+        #endregion
+
+        #region IEnumerable Members
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")]
+        IEnumerator IEnumerable.GetEnumerator() {
+            return GetEnumerator();
+        }
+        #endregion
+    }
+}