Convert .MSG file to TNEF file

msgtotnef.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Aspose.Email;

namespace msgtotnef
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 2)
            {
                Console.WriteLine("Usage: " + System.AppDomain.CurrentDomain.FriendlyName + " <input.msg> <output.tnef>");
            }
            else
            {
                string inputFile = args[0];
                string outputFile = args[1];
                using (Aspose.Email.Mapi.MapiMessage mailMessage = Aspose.Email.Mapi.MapiMessage.FromFile(inputFile))
                {
                    mailMessage.SaveAsTnef(outputFile);
                }
            }

        }
    }
}