Double recursive extension : Func « LINQ « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. LINQ
3. Func

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

    static class DoubleApplicationExtensions
    {
        public static Func<T, T> ApplyTwice<T>(this Func<T, T> original)
        {
            return x => original(original(x));
        }
    }

    class MainClass
    {
        static void Main()
        {
            Func<int, int> incrementer = x => x + x;
            Func<int, int> doubleIncrementer = incrementer.ApplyTwice();

            Console.WriteLine(doubleIncrementer(5));
        }
    }