Delegate Memorial Code

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

namespace ConsoleApplication1
{
    class Program
    {
        private delegate bool Del(int score);

        private static bool CheckPassed(int score)
        {
            if (score < 60)
                return true;
            else
                return false;

        }

        private static void Print(int value)
        {
            Console.Write("{0} ", value);
        }

     

        static void Main(string[] args)
        {
            int[] scores = new int[] { 80, 74, 81, 90, 34 };
            int _nindex = Array.FindIndex<int>(scores, new Predicate<int>(new Del(CheckPassed)));
            Console.WriteLine("{0}", _nindex);
            Array.ForEach<int>(scores,new Action<int>(Print));
        }
    }
}