using System;
using System.Linq;
using System.Collections.Generic;

public class Test
{
   

	public static void Main()
	{
	        var list = new List<int>() { 1, 2, 3, 4 };

            if (list.Count > 1)
                list.RemoveRange(1, list.Count - 1);

            Console.Write(string.Join(",", list.Select(i => i.ToString()).ToArray()));
	}
}