Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Runtime.Serialization/System/Runtime/Serialization/ExportOptions.cs

@@ -0,0 +1,40 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.Runtime.Serialization
+{
+    using System.Security;
+    using System.Security.Permissions;
+    using System.Collections.ObjectModel;
+
+    public class ExportOptions
+    {
+        Collection<Type> knownTypes;
+        IDataContractSurrogate dataContractSurrogate;
+
+        public IDataContractSurrogate DataContractSurrogate
+        {
+            get { return dataContractSurrogate; }
+            set { dataContractSurrogate = value; }
+        }
+
+        internal IDataContractSurrogate GetSurrogate()
+        {
+            return dataContractSurrogate;
+        }
+
+        public Collection<Type> KnownTypes
+        {
+            get
+            {
+                if (knownTypes == null)
+                {
+                    knownTypes = new Collection<Type>();
+                }
+                return knownTypes;
+            }
+        }
+    }
+}
+