using System;

public class Program

{

    public static void Main()

    {

        DateTime test1 = DateTime.UtcNow.AddHours(-1.25); //75 mins before's UTC Now  -- Pass test case -Token expired

        DateTime test2 = DateTime.UtcNow.AddHours(-1);   //60 mins before's UTC Now --Fail and edge test case - Token still alive

        DateTime test3 = DateTime.UtcNow.AddHours(0.25); // 15 after after UTC Now  -- Fail test case - Token still alive

        CheckTokenExpiration(test1);

        CheckTokenExpiration(test2);

        CheckTokenExpiration(test3);

    }

    public static void CheckTokenExpiration(DateTime tokenDate)

    {

        if((DateTime.UtcNow - tokenDate).TotalHours > 1)

            Console.WriteLine("Token expired");

        else

            Console.WriteLine("Token alive");

    }

}