Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/WebBaseEventKeyComparer.cs

@@ -0,0 +1,61 @@
+//------------------------------------------------------------------------------
+// <copyright file="WebBaseEventKeyComparer.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration
+{
+    using System;
+    using System.Collections;
+    using System.Diagnostics.CodeAnalysis;
+
+    internal class WebBaseEventKeyComparer : IEqualityComparer {
+        public new bool Equals(object x, object y) {
+            CustomWebEventKey   xKey = (CustomWebEventKey)x;
+            CustomWebEventKey   yKey = (CustomWebEventKey)y;
+            
+            if (xKey._eventCode == yKey._eventCode && xKey._type.Equals(yKey._type)) {
+                return true;
+            }
+
+            return false;
+        }
+
+        [SuppressMessage("Microsoft.Usage", "CA2303:FlagTypeGetHashCode", Justification = "CustomWebEventKey is internal - okay")]
+        public int GetHashCode(object obj)
+        {
+            return ((CustomWebEventKey)obj)._eventCode ^ ((CustomWebEventKey)obj)._type.GetHashCode();
+        }
+
+        public int Compare(object x, object y) {
+            CustomWebEventKey   xKey = (CustomWebEventKey)x;
+            CustomWebEventKey   yKey = (CustomWebEventKey)y;
+
+            int     xEventCode = xKey._eventCode;
+            int     yEventCode = yKey._eventCode;
+
+            if (xEventCode == yEventCode) {
+                Type            xType = xKey._type;
+                Type            yType = yKey._type;
+
+                if (xType.Equals(yType)) {
+                    return 0;
+                }
+                else {
+                    return Comparer.Default.Compare(xType.ToString(), yType.ToString());
+                }
+            }
+            else {
+                if (xEventCode > yEventCode) {
+                    return 1;
+                } 
+                else {
+                    return -1;
+                }
+            }
+            
+        }
+
+    }
+}