Subtract 15 minutes from the current TimeSpan and print the result

   
  

using System;
using System.Collections.Generic;
using System.Text;

class Program {
    static void Main(string[] args) {
        TimeSpan ts = new TimeSpan(4, 30, 0);
        Console.WriteLine(ts);

        Console.WriteLine(ts.Subtract(new TimeSpan(0, 15, 0)));
    }
}