using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        TimeSpan t = new TimeSpan(0,3,0,0);

​

        List<TimeSpan> list = new List<TimeSpan>(){

           new TimeSpan(0,3,0,0),

           new TimeSpan(0,2,0,0)

        };

        list = list.Where(x => x.CompareTo(t) == 0).ToList();

        Console.WriteLine(list.Count);

    }

}