Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.IdentityModel/System/IdentityModel/Transform.cs

@@ -0,0 +1,33 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.IdentityModel
+{
+    using System.Xml;
+
+    abstract class Transform
+    {
+        protected Transform()
+        {
+        }
+
+        public abstract string Algorithm
+        {
+            get;
+        }
+
+        public virtual bool NeedsInclusiveContext
+        {
+            get { return false; }
+        }
+
+        public abstract object Process(object input, SignatureResourcePool resourcePool, DictionaryManager dictionaryManager);
+
+        public abstract byte[] ProcessAndDigest(object input, SignatureResourcePool resourcePool, string digestAlgorithm, DictionaryManager dictionaryManager);
+
+        public abstract void ReadFrom(XmlDictionaryReader reader, DictionaryManager dictionaryManager, bool preserveComments);
+
+        public abstract void WriteTo(XmlDictionaryWriter writer, DictionaryManager dictionaryManager);
+    }
+}