Program.cs

namespace WinTombstone
{
    static class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            Application.SetHighDpiMode(HighDpiMode.SystemAware);
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            AppDomain.CurrentDomain.UnhandledException += (s, e) => FatalError(e.ExceptionObject as Exception);
            Application.ThreadException += (s, e) => FatalError(e.Exception);

            Application.Run(new MainForm());
        }

        static void FatalError(Exception ex)
        {
            if (ex == null) return;
            try
            {
                MessageBox.Show($"Error: {ex.Message}\n\n{ex.StackTrace}", "WinTombstone Fatal", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            catch { }
        }
    }
}