using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace SampleGoInterop
{
    class Program
    {
        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
        public delegate void CallbackDelegate(long handle);

        [DllImport("sample-dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
        public static extern void RunCallback();

        [DllImport("sample-dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
        public static extern void SetCallback(CallbackDelegate func);

        static void Callback(long handle)
        {
            try
            {
                Console.WriteLine("Callback() is called");

                int i = 0;

                i /= 0;
            }
            catch (Exception ex)
            {
                Console.WriteLine("We've recovered!");
            }
        }

        static void Main(string[] args)
        {
            SetCallback(new CallbackDelegate(Callback));

            RunCallback();
        }
    }
}