Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/contextstaticattribute.cs

@@ -0,0 +1,34 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*============================================================
+**
+** File:        ContextStaticAttribute.cs
+** 
+**  
+**
+** Purpose:     Custom attribute to indicate that the field should be treated 
+**              as a static relative to a context.
+**          
+**
+**
+===========================================================*/
+namespace System {
+    
+    using System;
+    using System.Runtime.Remoting;
+[Serializable]
+    [AttributeUsage(AttributeTargets.Field, Inherited = false)]
+    [System.Runtime.InteropServices.ComVisible(true)]
+#if FEATURE_CORECLR
+    [Obsolete("ContextStaticAttribute is not supported in this release. It has been left in so that legacy tools can be used with this release, but it cannot be used in your code.", true)] 
+#endif // FEATURE_CORECLR
+    public class  ContextStaticAttribute : Attribute
+    {
+        public ContextStaticAttribute()
+        {
+        }
+    }
+}