Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/stringcomparison.cs

@@ -0,0 +1,29 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*============================================================
+**
+** Enum:  StringComparison
+**
+**
+** Purpose: A mechanism to expose a simplified infrastructure for 
+**          Comparing strings. This enum lets you choose of the custom 
+**          implementations provided by the runtime for the user.
+**
+** 
+===========================================================*/
+namespace System{
+    
+    [Serializable]
+[System.Runtime.InteropServices.ComVisible(true)]
+    public enum StringComparison {
+        CurrentCulture = 0,
+        CurrentCultureIgnoreCase = 1,
+        InvariantCulture = 2,
+        InvariantCultureIgnoreCase = 3,
+        Ordinal = 4,
+        OrdinalIgnoreCase = 5,
+    }
+}