Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/collections/icomparer.cs

@@ -0,0 +1,33 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*============================================================
+**
+** Interface:  IComparer
+** 
+** <OWNER>[....]</OWNER>
+**
+**
+** Purpose: Interface for comparing two Objects.
+**
+** 
+===========================================================*/
+namespace System.Collections {
+    
+    using System;
+    // The IComparer interface implements a method that compares two objects. It is
+    // used in conjunction with the Sort and BinarySearch methods on
+    // the Array and List classes.
+    // 
+    // Interfaces are not serializable
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public interface IComparer {
+        // Compares two objects. An implementation of this method must return a
+        // value less than zero if x is less than y, zero if x is equal to y, or a
+        // value greater than zero if x is greater than y.
+        // 
+        int Compare(Object x, Object y);
+    }
+}