C# how to convert Date to Epoch

ConvertDateToEpoch.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConvertDateTimeEpoch
{
    class ConvertDateToEpoch
    {
        static void Main(string[] args)
        {
            ConvertDateToEpoch program = new ConvertDateToEpoch();
            string fecha = "31/12/2015";
            Console.WriteLine(String.Format("Fecha: {0}, Fecha Epoch: {1}", fecha, program.convertDateToEpoch(fecha)));
        }

        public decimal convertDateToEpoch(string stringDate)
        {
            decimal result = 0;

            try
            {
                DateTime dt = DateTime.Parse(stringDate);
                TimeSpan ts = dt - new DateTime(1970, 1, 1);
                result = (decimal) ts.TotalMilliseconds;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }


            return result;
        }
    }
}