Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/mscorlib/system/serializableattribute.cs

@@ -0,0 +1,36 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*============================================================
+**
+** Class: SerializableAttribute
+**
+**
+** Purpose: Used to mark a class as being serializable
+**
+**
+============================================================*/
+namespace System {
+
+    using System;
+    using System.Reflection;
+
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum | AttributeTargets.Delegate, Inherited = false)]
+[System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class SerializableAttribute : Attribute 
+    {
+        internal static Attribute GetCustomAttribute(RuntimeType type) 
+        { 
+            return (type.Attributes & TypeAttributes.Serializable) == TypeAttributes.Serializable ? new SerializableAttribute() : null; 
+        }
+        internal static bool IsDefined(RuntimeType type) 
+        { 
+            return type.IsSerializable; 
+        }
+
+        public SerializableAttribute() {
+        }
+    }
+}