using System;

public class Program

{

    public static void Main()

    {

        var timestamp = 1745688336773;

        var calculatedDate = DateTimeOffset.FromUnixTimeMilliseconds(timestamp);

        Console.WriteLine("Timestamp: {0} is {1}", timestamp, calculatedDate);

        var date = new DateTimeOffset(new DateTime(2022, 3, 11));

        var calculatedTimestamp = date.ToUnixTimeMilliseconds();

        Console.WriteLine("Date: {0} is {1}", date, calculatedTimestamp);

    }

}