using System;

using System.Linq;

public class Simple {

  public static void Main() {

    string[] names = { "Burke", "Laptop", "Computer", 

                       "Mobile", "Ahemed", "Sania", 

                       "Kungada", "David","United","Sinshia" };

​

   var query = from s in names 

               where  s.Length == 4

               select s;

​

    foreach (string item in query)

      Console.WriteLine(item);

  }

}