Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;

namespace Notepad
{
    static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.ThreadException += new ThreadExceptionEventHandler(Form1_UIThreadException);
            Application.Run(new MainForm());
        }

        private static void Form1_UIThreadException(object sender, ThreadExceptionEventArgs t)
        {
            DialogResult result = DialogResult.Cancel;
            try
            {
                result = ShowThreadExceptionDialog("Windows Forms Error", t.Exception);
            }
            catch
            {
                try
                {
                    MessageBox.Show("Fatal Windows Forms Error",
                        "Fatal Windows Forms Error", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Stop);
                }
                finally
                {
                    Application.Exit();
                }
            }
        }
        private static DialogResult ShowThreadExceptionDialog(string title, Exception e)
        {
            string errorMsg = "An application error occurred. Please contact the adminstrator " +
                "with the following information:\n\n";
            errorMsg = errorMsg + e.Message + "\n\nStack Trace:\n" + e.StackTrace;
            return MessageBox.Show(errorMsg, title, MessageBoxButtons.AbortRetryIgnore,
                MessageBoxIcon.Stop);
        }
    }
}