using System;

public class Program

{

    public static void Main()

    {

        DateTime dt = new DateTime(2021,11,16,01,00,00); // 2021-11-16 08:50:00.0000000

        DateTime dtLast = new DateTime(2021,11,13,23,00,00); // 2021-11-13 10:50:00.0000000

        dt = new DateTime(2021,11,16,01,00,00); // 2021-11-16 08:50:00.0000000

        dtLast = new DateTime(2021,11,13,03,00,00); // 2021-11-13 10:50:00.0000000

        //dt.Dump();

        //dtLast.Dump();

        //(dtLast.TimeOfDay - dt.TimeOfDay).Dump();

        //(dt.TimeOfDay - dtLast.TimeOfDay).Dump();

        (dtLast - dt).Duration().Hours.Dump();      

        (dt - dtLast).Duration().Hours.Dump();

​

​

​

        //TimeSpan diff = dt - dtLast;

        //(dtLast - dt).Dump();

        //(dt - dtLast).Hours.Dump();               

        //(dt - dtLast).Days.Dump();                        

        //(dtLast - dt).Days.Dump();            

​

        //(dtLast - dt).Dump();

        //Math.Abs(dt - dtLast).Dump();

        //Math.Abs(dtLast - dt).Dump();

​

    }

}