Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,70 @@
+//------------------------------------------------------------------------------
+// <copyright file="AsyncCompletedEventArgs.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.ComponentModel
+{
+    using System.Diagnostics.CodeAnalysis;
+    using System.Security.Permissions;
+    using System.Reflection;
+
+    [HostProtection(SharedState = true)]
+    public class AsyncCompletedEventArgs : System.EventArgs
+    {
+        private readonly Exception error;
+        private readonly bool cancelled;
+        private readonly object userState;
+        
+        [Obsolete("This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.", true)]
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public AsyncCompletedEventArgs()
+        {
+             // This method was public in .NET CF, but didn't do anything.  The fact that it was public was to
+             // work around a tooling issue on their side.  
+        }
+        
+        public AsyncCompletedEventArgs(Exception error, bool cancelled, object userState)
+        {
+            this.error = error;
+            this.cancelled = cancelled;
+            this.userState = userState;
+        }
+        
+        [ SRDescription(SR.Async_AsyncEventArgs_Cancelled) ]
+        public bool Cancelled
+        {
+            get { return cancelled; }
+        }
+        
+        [ SRDescription(SR.Async_AsyncEventArgs_Error) ]
+        public Exception Error
+        {
+            get { return error; }
+        }
+
+        [ SRDescription(SR.Async_AsyncEventArgs_UserState) ]
+        public object UserState
+        {
+            get { return userState; }
+        }
+
+        // Call from every result 'getter'. Will throw if there's an error or operation was cancelled
+        //
+        [SuppressMessage("Microsoft.Design", "CA1030:UseEventsWhereAppropriate")]
+        protected void RaiseExceptionIfNecessary()
+        {
+            if (Error != null)
+            {
+                throw new TargetInvocationException(SR.GetString(SR.Async_ExceptionOccurred), Error);
+            }
+            else if (Cancelled)
+            {
+                throw new InvalidOperationException(SR.GetString(SR.Async_OperationCancelled));
+            }
+            
+        }
+        
+    }
+}