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Dispatcher.UnhandledException Event

Occurs when a thread exception is thrown and uncaught during execution of a delegate by way of Invoke or BeginInvoke.

Namespace:  System.Windows.Threading
Assembly:  WindowsBase (in WindowsBase.dll)

'Declaration
Public Event UnhandledException As DispatcherUnhandledExceptionEventHandler
'Usage
Dim instance As Dispatcher 
Dim handler As DispatcherUnhandledExceptionEventHandler 

AddHandler instance.UnhandledException, handler
You cannot use this event in XAML.

This event is raised when an exception that was thrown during execution of a delegate by way of Invoke or BeginInvoke is uncaught.

A handler can mark the exception as handled, which will prevent the internal exception handler from being called.

Event handlers for this event must be written with care to avoid creating secondary exceptions and to catch any that occur. It is recommended to avoid allocating memory or doing any resource intensive operations in the handler.

The UnhandledExceptionFilter event provides a means to not raise the UnhandledException event. The UnhandledExceptionFilter event is raised first, and If RequestCatch on the DispatcherUnhandledExceptionFilterEventArgs is set to false, the UnhandledException event will not be raised.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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