Program.cs

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

namespace ImageEnhancingUtility.Winforms
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            AppDomain currentDomain = AppDomain.CurrentDomain;
            currentDomain.UnhandledException += new UnhandledExceptionEventHandler(MyHandler);

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);            
            Application.Run(new MainFormDark());
        }

        static void MyHandler(object sender, UnhandledExceptionEventArgs args)
        {
            Exception e = (Exception)args.ExceptionObject;
            MessageBox.Show("MyHandler caught : " + e.Message + $"\n{e.InnerException?.Message}");
            //MessageBox.Show($"Runtime terminating: {args.IsTerminating}");
        }
    }
}