Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Activities/LocalService/LogicalCallContext.cs

@@ -0,0 +1,54 @@
+#region Using directives
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Runtime.Remoting.Messaging;
+using System.Runtime.Serialization;
+using System.Security;
+using System.Security.Permissions;
+using System.Security.Principal;
+#endregion
+
+namespace System.Workflow.Activities
+{
+    [Serializable]
+    internal sealed class IdentityContextData : ILogicalThreadAffinative, ISerializable
+    {
+        internal const string IdentityContext = "__identitycontext__";
+        
+        String identity;
+
+        internal IdentityContextData(String identity)
+        {
+            this.identity = identity;
+        }
+
+        private IdentityContextData(SerializationInfo info, StreamingContext context)
+        {
+            SerializationInfoEnumerator enumerator = info.GetEnumerator();
+            while (enumerator.MoveNext())
+            {
+                if (enumerator.Name.Equals("identity"))
+                {
+                    this.identity = (String)enumerator.Value;
+                }
+            }
+        }
+
+        [SecurityPermission( SecurityAction.Demand, SerializationFormatter = true)]
+        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+            if (this.identity != null)
+                info.AddValue("identity", identity.ToString());
+        }
+
+        internal String Identity
+        {
+            get
+            {
+                return identity;
+            }
+        }
+    }
+}