using System;

public class Program

{

    public static void Main()

    {

        DateTime date = new DateTime(1970, 1, 1);       

        Console.WriteLine( "epoch: " + date );

        var time0 = EpochToDateTime(0);

        Console.WriteLine( "time0: " + date );

    }

    private static DateTime _epochStartDate = new DateTime(1970, 1, 1);

    public static DateTime EpochToDateTime(ulong theMiliSeconds)

    {

        return _epochStartDate.AddMilliseconds(theMiliSeconds);

    }

}