using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        IList<string> strList = new List<string>(){ "Three", "Four", "Five", "Hundred" };

​

        var newList = strList.TakeWhile(s => s.Length > 4);

        foreach(var str in newList)

            Console.WriteLine(str);

​

    }

}