How Can I Handle Unhandled Exceptions in a WPF Application to Prevent Crashes and Error Messages?

WPF global exception handling

Question:

In a WPF application, how to handle unhandled exceptions that cause the application to crash while avoiding displaying an error message?

Answer:

To catch unhandled exceptions in WPF applications, there are several methods to choose from, which work at different levels:

• AppDomain.CurrentDomain.UnhandledException: Handles exceptions for all threads in the application domain.
• Dispatcher.UnhandledException: Handles exceptions for a specific UI scheduler thread.
• Application.Current.DispatcherUnhandledException: Handles exceptions on the application's main UI dispatcher thread.
• TaskScheduler.UnobservedTaskException: Handles exceptions for asynchronous operations using the task scheduler.

The best choice depends on the specific needs and architecture of your application. In most cases, one of the following options applies:

• Use AppDomain.CurrentDomain.UnhandledException to handle exceptions for all threads.
• Use Dispatcher.UnhandledException on the main UI thread.
• Use Application.Current.DispatcherUnhandledException to centralize processing for the entire application.

By implementing exception handlers at the appropriate level, you can display custom messages to the user, or take other steps to provide a more graceful error experience.

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