using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var lst = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

        Console.WriteLine( lst.Count );

        lst.Remove( 5 );

        Console.WriteLine( lst.Count );

    }

}