C # executable file method throws an exception

In the program entry add the following code:

 AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

Add method behind:

        private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            Console.WriteLine(e.ExceptionObject.ToString());
            MessageBox.Show(e.ExceptionObject.ToString());
        }