Imported Upstream version 4.4.2.4

Former-commit-id: 92904c9c5915c37244316e42ba99e7b934ed7ee2

configure.REMOVED.git-id

@@ -1 +1 @@
-2d6bcb46584f03dd01cd55dd2a04c15b4a6a5fec
+047d2af192055dda39f35c668102b5948e87c44b

configure.ac.REMOVED.git-id

@@ -1 +1 @@
-b0b5573ff57c299411be9915864eaa21d4933c2d
+2517961607b5dcd9778743fe589d6ff7f167a776

external/referencesource/System.Core/System/Security/Cryptography/BCryptNative.cs

@@ -59,7 +59,7 @@ namespace System.Security.Cryptography {
             public const string Sha512 = "SHA512";              // BCRYPT_SHA512_ALGORITHM
             internal const string Rsa = "RSA";                  // BCRYPT_RSA_ALGORITHM
         }
-
+#if !MONO
         /// <summary>
         ///     Well known key blob tyes
         /// </summary>
@@ -454,5 +454,6 @@ namespace System.Security.Cryptography {
             }
             return keyBlob;
         }
+#endif
     }
 }

external/referencesource/System.Core/System/Security/Cryptography/CngKey.cs

@@ -31,6 +31,10 @@ namespace System.Security.Cryptography {
     /// </summary>
     [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
     public sealed class CngKey : IDisposable {
+#if MONO
+        public void Dispose() {
+        }
+#else
         private SafeNCryptKeyHandle m_keyHandle;
         private SafeNCryptProviderHandle m_kspHandle;
 
@@ -816,5 +820,6 @@ namespace System.Security.Cryptography {
             Contract.Assert(m_keyHandle != null);
             NCryptNative.SetProperty(m_keyHandle, property.Name, property.Value, property.Options);
         }
+#endif
     }
 }

external/referencesource/System.Core/System/Security/Cryptography/ECDsaCng.cs

@@ -18,6 +18,15 @@ namespace System.Security.Cryptography {
     /// </summary>
     [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
     public sealed class ECDsaCng : ECDsa {
+#if MONO
+        public override byte[] SignHash(byte[] hash) {
+            throw new NotImplementedException();
+        }
+
+        public override bool VerifyHash(byte[] hash, byte[] signature) {
+            throw new NotImplementedException();
+        }
+#else
         private static KeySizes[] s_legalKeySizes = new KeySizes[] { new KeySizes(256, 384, 128), new KeySizes(521, 521, 0) };
 
         private CngKey m_key;
@@ -407,5 +416,6 @@ namespace System.Security.Cryptography {
                 return hasher.HashFinal();
             }
         }
+    #endif
     }
 }

external/referencesource/System.Core/System/Security/Cryptography/NCryptNative.cs

@@ -8,7 +8,9 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+#if !MONO
 using System.Numerics;
+#endif
 using System.Runtime.CompilerServices;
 using System.Runtime.ConstrainedExecution;
 using System.Runtime.InteropServices;
@@ -100,7 +102,7 @@ namespace System.Security.Cryptography {
         ProtectKey = 0x00000001,                        // NCRYPT_UI_PROTECT_KEY_FLAG    
         ForceHighProtection = 0x00000002                // NCRYPT_UI_FORCE_HIGH_PROTECTION_FLAG
     }
-
+#if !MONO
     /// <summary>
     ///     Native interop with CNG's NCrypt layer. Native definitions are in ncrypt.h
     /// </summary>
@@ -1741,4 +1743,5 @@ namespace System.Security.Cryptography {
             return error == ErrorCode.Success;
         }
     }
+#endif
 }

external/referencesource/System.Core/System/Security/Cryptography/RsaCng.cs

@@ -10,6 +10,18 @@ namespace System.Security.Cryptography
 {
     public sealed class RSACng : RSA
     {
+#if MONO
+        public override RSAParameters ExportParameters(bool includePrivateParameters)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void ImportParameters(RSAParameters parameters)
+        {
+            throw new NotImplementedException();
+        }
+#else
+
         // See https://msdn.microsoft.com/en-us/library/windows/desktop/bb931354(v=vs.85).aspx
         private static KeySizes[] s_legalKeySizes = new KeySizes[] { new KeySizes(512, 16384, 64) };
 
@@ -504,5 +516,6 @@ namespace System.Security.Cryptography
                  throw new CryptographicException(SR.GetString(SR.Cryptography_UnsupportedPaddingMode));
             }
         }
+#endif
     }
 }

external/referencesource/System/compmod/microsoft/win32/safehandles/SafeProcessHandle.cs

@@ -42,10 +42,11 @@ namespace Microsoft.Win32.SafeHandles {
             SetHandle(existingHandle);
         }
 
+#if !MONO
         [DllImport(ExternDll.Kernel32, CharSet=System.Runtime.InteropServices.CharSet.Auto, SetLastError=true)]
         [ResourceExposure(ResourceScope.Machine)]
         internal static extern SafeProcessHandle OpenProcess(int access, bool inherit, int processId);
-
+#endif
         
         internal void InitialSetHandle(IntPtr h){
             Debug.Assert(base.IsInvalid, "Safe handle should only be set once");
@@ -54,7 +55,11 @@ namespace Microsoft.Win32.SafeHandles {
         
         override protected bool ReleaseHandle()
         {
+#if !MONO
             return SafeNativeMethods.CloseHandle(handle);
+#else
+            return NativeMethods.CloseProcess (handle);
+#endif
         }
 
     }

mcs/build/common/Consts.cs

@@ -34,7 +34,7 @@ static class Consts
 	// Use these assembly version constants to make code more maintainable.
 	//
 
-	public const string MonoVersion = "4.4.1.0";
+	public const string MonoVersion = "4.4.2.0";
 	public const string MonoCompany = "Mono development team";
 	public const string MonoProduct = "Mono Common Language Infrastructure";
 	public const string MonoCopyright = "(c) Various Mono authors";

mcs/class/Facades/Makefile

@@ -28,7 +28,7 @@ include $(MCS_BUILD_DIR)/rules.make
 
 dist-local: dist-default
 
-DIST_SUBDIRS = $(net_4_x_PARALLEL_SUBDIRS)
+DIST_SUBDIRS = $(net_4_x_PARALLEL_SUBDIRS) $(net_4_x_SUBDIRS) $(mobile_only_SUBDIRS)
 DISTFILES=subdirs.make
 
 doc-update-local:
@@ -37,4 +37,7 @@ doc-update-local:
 doc-update-recursive:
 	@echo "do not recurse the Facades folder"
 
-System System.Core System.ComponentModel.DataAnnotations System.Numerics System.Runtime.Serialization System.XML System.ComponentModel.Composition System.ServiceModel System.Xml.Linq:
+System System.Core System.ComponentModel.DataAnnotations System.Numerics System.Runtime.Serialization System.XML \
+System.ComponentModel.Composition System.ServiceModel System.Xml.Linq System.Data System.IO.Compression.FileSystem \
+System.ServiceProcess System.Security System.Net.Http.WebRequest System.Net.Http:
+

mcs/class/Facades/Microsoft.Win32.Registry.AccessControl/Microsoft.Win32.Registry.AccessControl.dll.sources

@@ -1,3 +1,5 @@
 TypeForwarders.cs
 AssemblyInfo.cs
 
+../../../build/common/MonoTODOAttribute.cs
+RegistryAclExtensions.cs

mcs/class/Facades/Microsoft.Win32.Registry.AccessControl/RegistryAclExtensions.cs

@@ -0,0 +1,57 @@
+//
+// RegistryAclExtensions.cs
+//
+// Author:
+//   Alexander Köplinger (alexander.koeplinger@xamarin.com)
+//
+// (C) 2016 Xamarin, Inc.
+//
+
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Security;
+using System.Security.AccessControl;
+
+namespace Microsoft.Win32
+{
+	public static class RegistryAclExtensions
+	{
+		[MonoTODO]
+		public static RegistrySecurity GetAccessControl (this RegistryKey key)
+		{
+			throw new NotImplementedException ();
+		}
+
+		[MonoTODO]
+		public static RegistrySecurity GetAccessControl (this RegistryKey key, AccessControlSections includeSections)
+		{
+			throw new NotImplementedException ();
+		}
+
+		[MonoTODO]
+		public static void SetAccessControl (this RegistryKey key, RegistrySecurity registrySecurity)
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}

mcs/class/Facades/Microsoft.Win32.Registry.AccessControl/TypeForwarders.cs

@@ -23,4 +23,3 @@
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.AccessControl.RegistryAccessRule))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.AccessControl.RegistryAuditRule))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.AccessControl.RegistrySecurity))]
-//Missing: [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryAclExtensions))]

mcs/class/Facades/Microsoft.Win32.Registry/TypeForwarders.cs

@@ -20,13 +20,11 @@
 // THE SOFTWARE.
 // 
 
-#if !MOBILE
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.Registry))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryHive))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryKey))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryValueKind))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryValueOptions))]
-#endif
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryOptions))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.RegistryView))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(Microsoft.Win32.SafeHandles.SafeRegistryHandle))]

mcs/class/Facades/System.ComponentModel.Primitives/TypeForwarders.cs

@@ -20,9 +20,27 @@
 // THE SOFTWARE.
 // 
 
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.BrowsableAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CategoryAttribute))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ComponentCollection))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DescriptionAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DesignOnlyAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DesignerCategoryAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DesignerSerializationVisibility))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DesignerSerializationVisibilityAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DisplayNameAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.EventHandlerList))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.IComponent))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.IContainer))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ISite))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ImmutableObjectAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.InitializationEventAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.LocalizableAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.MergablePropertyAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.NotifyParentPropertyAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ParenthesizePropertyNameAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ReadOnlyAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.RefreshProperties))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.RefreshPropertiesAttribute))]
 
 

mcs/class/Facades/System.ComponentModel.TypeConverter/TypeForwarders.cs

@@ -21,34 +21,61 @@
 // 
 
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ArrayConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.AttributeCollection))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.AttributeProviderAttribute))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.BaseNumberConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.BooleanConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ByteConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CancelEventHandler))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CharConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CollectionChangeAction))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CollectionChangeEventArgs))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CollectionChangeEventHandler))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CollectionConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.CustomTypeDescriptor))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DateTimeConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DateTimeOffsetConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DecimalConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DefaultEventAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DefaultPropertyAttribute))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.DoubleConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.EnumConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.EventDescriptor))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.EventDescriptorCollection))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ExtenderProvidedPropertyAttribute))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.GuidConverter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.HandledEventArgs))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.HandledEventHandler))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ICustomTypeDescriptor))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.IExtenderProvider))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.IListSource))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ITypeDescriptorContext))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ITypedList))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.Int16Converter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.Int32Converter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.Int64Converter))]
-[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ITypeDescriptorContext))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.InvalidAsynchronousStateException))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.MemberDescriptor))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.MultilineStringConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.NullableConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.PropertyDescriptor))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.PropertyDescriptorCollection))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.ProvidePropertyAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.RefreshEventArgs))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.RefreshEventHandler))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.SByteConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.SingleConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.StringConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TimeSpanConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeConverterAttribute))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeDescriptionProvider))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeDescriptionProviderAttribute))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeDescriptor))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.TypeListConverter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.UInt16Converter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.UInt32Converter))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ComponentModel.UInt64Converter))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.UriTypeConverter))]
 
 

mcs/class/Facades/System.Console/TypeForwarders.cs

@@ -24,6 +24,7 @@
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleCancelEventArgs))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleCancelEventHandler))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleColor))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleKey))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleKeyInfo))]
+[assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleModifiers))]
 [assembly: System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.ConsoleSpecialKey))]
-
-

mcs/class/Facades/System.Data.Common/DbColumn.cs

@@ -0,0 +1,64 @@
+//
+// DbColumn.cs
+//
+// Authors:
+//	Marek Safar  <marek.safar@gmail.com>
+//
+// Copyright (C) 2016 Xamarin Inc (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System.Collections.Generic;
+
+namespace System.Data.Common
+{
+    public abstract class DbColumn
+    {
+        public bool? AllowDBNull { get; protected set; }
+        public string BaseCatalogName { get; protected set; }
+        public string BaseColumnName { get; protected set; }
+        public string BaseSchemaName { get; protected set; }
+        public string BaseServerName { get; protected set; }
+        public string BaseTableName { get; protected set; }
+        public string ColumnName { get; protected set; }
+        public int? ColumnOrdinal { get; protected set; }
+        public int? ColumnSize { get; protected set; }
+        public bool? IsAliased { get; protected set; }
+        public bool? IsAutoIncrement { get; protected set; }
+        public bool? IsExpression { get; protected set; }
+        public bool? IsHidden { get; protected set; }
+        public bool? IsIdentity { get; protected set; }
+        public bool? IsKey { get; protected set; }
+        public bool? IsLong { get; protected set; }
+        public bool? IsReadOnly { get; protected set; }
+        public bool? IsUnique { get; protected set; }
+        public int? NumericPrecision { get; protected set; }
+        public int? NumericScale { get; protected set; }
+        public string UdtAssemblyQualifiedName { get; protected set; }
+        public Type DataType { get; protected set; }
+        public string DataTypeName { get; protected set; }
+        public virtual object this[string property] {
+        	get {
+        		throw new NotImplementedException ();
+        	}
+        }
+    }
+}

mcs/class/Facades/System.Data.Common/DbDataReaderExtensions.Facade.cs

@@ -0,0 +1,85 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+
+namespace System.Data.Common
+{
+
+    internal class DataRowDbColumn : DbColumn
+    {
+        private DataColumnCollection schemaColumns;
+        private DataRow schemaRow;
+
+        public DataRowDbColumn(DataRow readerSchemaRow, DataColumnCollection readerSchemaColumns)
+        {
+            this.schemaRow = readerSchemaRow;
+            this.schemaColumns = readerSchemaColumns;
+            populateFields();
+        }
+
+        private void populateFields()
+        {
+            AllowDBNull = GetDbColumnValue<bool?>(SchemaTableColumn.AllowDBNull);
+            BaseCatalogName = GetDbColumnValue<string>(SchemaTableOptionalColumn.BaseCatalogName);
+            BaseColumnName = GetDbColumnValue<string>(SchemaTableColumn.BaseColumnName);
+            BaseSchemaName = GetDbColumnValue<string>(SchemaTableColumn.BaseSchemaName);
+            BaseServerName = GetDbColumnValue<string>(SchemaTableOptionalColumn.BaseServerName);
+            BaseTableName = GetDbColumnValue<string>(SchemaTableColumn.BaseTableName);
+            ColumnName = GetDbColumnValue<string>(SchemaTableColumn.ColumnName);
+            ColumnOrdinal = GetDbColumnValue<int?>(SchemaTableColumn.ColumnOrdinal);
+            ColumnSize = GetDbColumnValue<int?>(SchemaTableColumn.ColumnSize);
+            IsAliased = GetDbColumnValue<bool?>(SchemaTableColumn.IsAliased);
+            IsAutoIncrement = GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsAutoIncrement);
+            IsExpression = GetDbColumnValue<bool>(SchemaTableColumn.IsExpression);
+            IsHidden = GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsHidden);
+            IsIdentity = GetDbColumnValue<bool?>("IsIdentity");
+            IsKey = GetDbColumnValue<bool?>(SchemaTableColumn.IsKey);
+            IsLong = GetDbColumnValue<bool?>(SchemaTableColumn.IsLong);
+            IsReadOnly = GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsReadOnly);
+            IsUnique = GetDbColumnValue<bool?>(SchemaTableColumn.IsUnique);
+            NumericPrecision = GetDbColumnValue<int?>(SchemaTableColumn.NumericPrecision);
+            NumericScale = GetDbColumnValue<int?>(SchemaTableColumn.NumericScale);
+            UdtAssemblyQualifiedName = GetDbColumnValue<string>("UdtAssemblyQualifiedName");
+            DataType = GetDbColumnValue<Type>(SchemaTableColumn.DataType);
+            DataTypeName = GetDbColumnValue<string>("DataTypeName");
+        }
+
+        private T GetDbColumnValue<T>(string columnName)
+        {
+            if (!schemaColumns.Contains(columnName))
+            {
+                return default(T);
+            }
+            object schemaObject = schemaRow[columnName];
+            if (schemaObject is T)
+            {
+                return (T)schemaObject;
+            }
+            return default(T);
+        }
+    }
+
+    public static class DbDataReaderExtensions
+    {
+        public static System.Collections.ObjectModel.ReadOnlyCollection<DbColumn> GetColumnSchema(this DbDataReader reader)
+        {
+            IList<DbColumn> columnSchema = new List<DbColumn>();
+            DataTable schemaTable = reader.GetSchemaTable();
+            DataColumnCollection schemaTableColumns = schemaTable.Columns;
+            foreach (DataRow row in schemaTable.Rows)
+            {
+                DbColumn dbColumn = new DataRowDbColumn(row, schemaTableColumns);
+                columnSchema.Add(dbColumn);
+            }
+            System.Collections.ObjectModel.ReadOnlyCollection<DbColumn> readOnlyColumnSchema = new System.Collections.ObjectModel.ReadOnlyCollection<DbColumn>(columnSchema);
+            return readOnlyColumnSchema;
+        }
+
+        public static bool CanGetColumnSchema(this DbDataReader reader)
+        {
+            return true;
+        }
+    }
+}

mcs/class/Facades/System.Data.Common/IDbColumnSchemaGenerator.cs

@@ -0,0 +1,35 @@
+//
+// IDbColumnSchemaGenerator.cs
+//
+// Authors:
+//	Marek Safar  <marek.safar@gmail.com>
+//
+// Copyright (C) 2016 Xamarin Inc (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+namespace System.Data.Common
+{
+	public interface IDbColumnSchemaGenerator
+	{
+		System.Collections.ObjectModel.ReadOnlyCollection<DbColumn> GetColumnSchema();
+	}
+}