using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var list = new List<string>{"one", "two","three"};

        var result = SomeFunction(list, x => x=="one");

        Console.WriteLine(result);

    }

    public static dynamic SomeFunction(dynamic list, Func<dynamic, dynamic> func)

    {

        foreach(var item in list)

            if (func(item))

                return item;

        return null;

    }

}