Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/CollectionChangeEventArgs.cs

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+//------------------------------------------------------------------------------
+// <copyright file="CollectionChangeEventArgs.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.ComponentModel {
+    using System;
+    using System.ComponentModel;
+    using System.Diagnostics;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    /// <para>Provides data for the <see langword='CollectionChange '/> event.</para>
+    /// </devdoc>
+    [HostProtection(SharedState = true)]
+    public class CollectionChangeEventArgs : EventArgs
+    {
+        private CollectionChangeAction action;
+        private object element;
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.ComponentModel.CollectionChangeEventArgs'/> class.</para>
+        /// </devdoc>
+        public CollectionChangeEventArgs(CollectionChangeAction action, object element) {
+            this.action = action;
+            this.element = element;
+        }
+
+        /// <devdoc>
+        ///    <para>Gets an action that specifies how the collection changed.</para>
+        /// </devdoc>
+        public virtual CollectionChangeAction Action {
+            get {
+                return action;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>Gets the instance of the collection with the change. </para>
+        /// </devdoc>
+        public virtual object Element {
+            get {
+                return element;
+            }
+        }
+    }
+}