Raises a user-supplied exception if an asynchronous operation failed.
Assemblies: System (in System.dll)
System.ComponentModel.EventBasedAsync (in System.ComponentModel.EventBasedAsync.dll)
If you have derived your own class from the AsyncCompletedEventArgs class, your read-only properties should call the method before returning the property value. If the component's asynchronous worker code assigns an exception to the Error property or sets the Cancelled property to true, the property will raise an exception if a client tries to read its value. This prevents clients from accessing properties that are potentially not valid due to a failure in the asynchronous operation.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8