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Dispatcher.UnhandledExceptionFilter Event

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

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

public event DispatcherUnhandledExceptionFilterEventHandler UnhandledExceptionFilter
/** @event */
public void add_UnhandledExceptionFilter (DispatcherUnhandledExceptionFilterEventHandler value)

/** @event */
public void remove_UnhandledExceptionFilter (DispatcherUnhandledExceptionFilterEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
You cannot use this event in XAML.

This event is raised during the filter stage for an exception that is raised during execution of a delegate by way of Invoke or BeginInvoke and is uncaught.

The callstack is not unwound at this point (first-chance exception).

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 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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