WPF Application Wide Exception Handling

What do you do if you want to catch all unhandled exceptions in an application?

In App.xaml:

<Application x:Class="MyApp.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    DispatcherUnhandledException="UnhandledException"
>

Add "DispatcherUnhandledException" to App.xaml. Then in your App.xaml.cs file:

private void UnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e) {
    var time = DateTime.Now;
    File.AppendAllText(@"C:\exps.csv", string.Format("{0},{1}", time, e.Exception.Message));
    File.AppendAllText(@"C:\sts.txt", time + ":\n" + e.Exception.StackTrace + "\n");
    e.Handled = false; //we want the user to experience the crash
}

That's it. So now if the app crashes on your users, you don't have to ask your users what steps they did to cause the crash. You can just look at the logs!

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-JP