Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/reflection/missing.cs

@@ -0,0 +1,42 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+// <OWNER>[....]</OWNER>
+// 
+
+namespace System.Reflection 
+{
+    using System;
+    using System.Runtime.Remoting;
+    using System.Runtime.Serialization;
+    using System.Security.Permissions;
+    using System.Diagnostics.Contracts;
+
+    // This is not serializable because it is a reflection command.
+    [Serializable]
+[System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class Missing: ISerializable
+    {
+        public static readonly Missing Value = new Missing();
+
+        #region Constructor
+        private Missing() { }
+        #endregion
+
+#if FEATURE_SERIALIZATION
+        #region ISerializable
+        [System.Security.SecurityCritical]  // auto-generated_required
+        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+            if (info == null)
+                throw new ArgumentNullException("info");
+            Contract.EndContractBlock();
+
+            UnitySerializationHolder.GetUnitySerializationInfo(info, this);
+        }
+        #endregion
+#endif
+    }
+}