Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

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+//------------------------------------------------------------------------------
+// <copyright file="ISynchronizeInvoke.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.ComponentModel {
+    using System; 
+    using System.Security.Permissions;
+         
+    /// <devdoc>
+    ///    <para>Provides a way to synchronously or asynchronously execute a delegate.</para>
+    /// </devdoc>
+    public interface ISynchronizeInvoke {
+    
+        /// <devdoc>
+        /// <para>Gets a value indicating whether the caller must call <see cref='System.ComponentModel.ISynchronizeInvoke.Invoke'/> when calling an object that implements 
+        ///    this interface.</para>
+        /// </devdoc>
+        bool InvokeRequired{get;}
+                
+        /// <devdoc>
+        ///    <para> 
+        ///       Executes the given delegate on the main thread that this object executes on.</para>
+        /// </devdoc>
+        [HostProtection(Synchronization=true, ExternalThreading=true)]
+        IAsyncResult BeginInvoke(Delegate method, object[] args);            
+        
+        /// <devdoc>
+        ///    <para>Waits until the process you started by 
+        ///       calling <see cref='System.ComponentModel.ISynchronizeInvoke.BeginInvoke'/> completes, and then returns
+        ///       the value generated by the process.</para>
+        /// </devdoc>
+        object EndInvoke(IAsyncResult result);                      
+        
+        /// <devdoc>
+        ///    <para> 
+        ///       Executes the given delegate on the main thread that this object
+        ///       executes on.</para>
+        /// </devdoc>
+        object Invoke(Delegate method, object[] args);        
+    }
+}