using System;

public class TimeUtils {
    private static readonly DateTime Jan1st1970 = new DateTime
    (1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

    public static long CurrentTimeMillis()
    {
        return (long) (DateTime.UtcNow - Jan1st1970).TotalMilliseconds;
    }
}