Get default value if the result is empty with DefaultIfEmpty in CSharp

using System;//from   w w w.jav  a  2s  . c  o m
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"HTML","CSS"};

        string name =presidents.Where(n => n.Equals("H")).DefaultIfEmpty("Missing").First(); 
        Console.WriteLine(name);

        Console.WriteLine(name);

    }
}