using System;

public class Program

{

    public delegate void Operation (string name);

    public static void Main()

    {

        Func<string,bool> Count = (string s) => s.Contains("nigel");

        Predicate<string> IsNigel = (string s ) => s.ToLower().Contains("nigel");

        Action<string> Act = (string s ) => Console.WriteLine(s.ToUpper());

        Count = TryThis;

        var x = Count("N");

        Console.WriteLine(x);

        Func<string,string> test;

        test = Test;

        var s = test("nigel");

        Console.WriteLine(s);

        Console.WriteLine(IsNigel("ssa"));

        Act("nigel");

    }

    public static bool TryThis(string s)=> true;

    public static string Test(string s) => s.ToUpper();

​

}