Error 'specified method is not supported'. Get call stack

Question

My application is giving an error 'specified method is not supported' on a client pc. I do not know where the problem is coming from. He does not have Visual Studio installed so its impossible to debug.

Is there any way to get a call stack in WPF if I write some debug code in the application and give him the new exe?

Answer 1

You can subscribe to DispatcherUnhandledException to capture the unhandled exception at application level and to log stack trace of exception.

Example of DispatcherUnhandledException in App.xaml.cs

public App() {
        this.DispatcherUnhandledException += OnDispatcherUnhandledException;
    }

    void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e) {
        string errorMessage = string.Format("An unhandled exception occurred: {0}", e.Exception.Message);
        MessageBox.Show(errorMessage, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
        e.Handled = true;
    }

In a big picture you can capture a exception at : You can trap unhandled exceptions at different levels:

1. AppDomain.UnhandledException From all threads in the AppDomain.
2. Dispatcher.UnhandledException From a single specific UI dispatcher thread.
3. Application.DispatcherUnhandledException From the main UI dispatcher thread in your WPF application.
4. TaskScheduler.UnobservedTaskException from within each AppDomain that uses a task scheduler for asynchronous operations. You should consider what level you need to trap unhandled exceptions at.

Deciding between #2 and #3 depends upon whether you're using more than one WPF thread.