using static System.Console;
using System;
public class Program {
public static void Main() => WriteLine(DateTime.Now.ToTimestamp());
}
public static class DateTimeExt {
public static readonly DateTime TimeStampStart = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
public static long ToTimestamp(this DateTime value) => (long)(value - TimeStampStart).TotalSeconds;
}
//https://pt.stackoverflow.com/q/124769/101
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