using System;

public class Program

{

    public static void Main()

    {

        var start = DateTime.SpecifyKind(DateTime.Parse("2021-03-25 09:16"), DateTimeKind.Local);

        var end = DateTime.SpecifyKind(DateTime.Parse("2021-03-28 05:00"), DateTimeKind.Local);

        Console.WriteLine($"Diff: {start:o} to {end:o}: {end-start}");

        start = DateTime.SpecifyKind(DateTime.Parse("2021-03-25 08:16"), DateTimeKind.Utc);

        end = DateTime.SpecifyKind(DateTime.Parse("2021-03-28 03:00"), DateTimeKind.Utc);

        Console.WriteLine($"UTC Diff: {start:o} to {end:o}: {end-start}");

    }

}