public static long ConvertToTimestamp(DateTime value) { return (long)(value - Epoch).TotalMilliseconds; } code example
Example: unix time c#
Int32 unixTimestamp = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;Int32 unixTimestamp = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;