Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/design/ActiveDocumentEvent.cs

@@ -0,0 +1,68 @@
+//------------------------------------------------------------------------------
+// <copyright file="ActiveDocumentEvent.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel.Design {
+    using System;
+    using System.ComponentModel;
+    using System.Diagnostics;
+    using System.Security.Permissions;
+    using Microsoft.Win32;
+
+    /// <devdoc>
+    /// <para>Provides data for the <see cref='System.ComponentModel.Design.IDesignerEventService.ActiveDesigner'/>
+    /// event.</para>
+    /// </devdoc>
+    [HostProtection(SharedState = true)]
+    [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name="FullTrust")]
+    [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name="FullTrust")]
+    public class ActiveDesignerEventArgs : EventArgs {
+        /// <devdoc>
+        ///     The document that is losing activation.
+        /// </devdoc>
+        private readonly IDesignerHost oldDesigner;
+
+        /// <devdoc>
+        ///     The document that is gaining activation.
+        /// </devdoc>
+        private readonly IDesignerHost newDesigner;
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.ComponentModel.Design.ActiveDesignerEventArgs'/>
+        /// class.</para>
+        /// </devdoc>
+        public ActiveDesignerEventArgs(IDesignerHost oldDesigner, IDesignerHost newDesigner) {
+            this.oldDesigner = oldDesigner;
+            this.newDesigner = newDesigner;
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or
+        ///       sets the document that is losing activation.
+        ///    </para>
+        /// </devdoc>
+        public IDesignerHost OldDesigner {
+            get {
+                return oldDesigner;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or
+        ///       sets the document that is gaining activation.
+        ///    </para>
+        /// </devdoc>
+        public IDesignerHost NewDesigner {
+            get {
+                return newDesigner;
+            }
+        }
+
+    }
+}