use ElementAtOrDefault : ElementAtOrDefault : LINQ C# Source Code

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

public class MainClass{
   public static void Main(){
            int[] numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9};
            var query = numbers.ElementAtOrDefault(9);
            Console.Write(query);
   }
}