using System;

using System.Collections.Generic;

using System.Linq;              

public class Program

{

    public static void Main()

    {

        List<int> numbers=new List<int>();

        //Gives the default value as the collection is empty

        int value=numbers.FirstOrDefault();

        Console.WriteLine(value);

        numbers.Add(1); numbers.Add(2); numbers.Add(3); numbers.Add(4); numbers.Add(5); numbers.Add(6); numbers.Add(7); numbers.Add(8);

        //Gives the first value that satisfies the condition

        value=numbers.FirstOrDefault(x=>x>2);

        Console.WriteLine(value);

        //Gives the Defualt value as  no element satisfies the condition

        value=numbers.FirstOrDefault(x=>x>100);

        Console.WriteLine(value);

    }

}