using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var result = "Hello World!".ToIdentity()

            .Bind(a => 7

                  .ToIdentity()

                  .Bind(b =>(new DateTime(2010, 1, 11))

                        .ToIdentity()

                        .Bind(c =>(a + ", " + b.ToString() + ", " + c.ToShortDateString())

                              .ToIdentity())));

​

Console.WriteLine(result.Value);

    }

}

​

public class Identity<T>

{

    public T Value { get; private set; }

​

    public Identity(T value)

    {

        Value = value;

    }

}

​

​

public static class Ext

{

    public static Identity<T> ToIdentity<T>(this T value)

{

    return new Identity<T>(value);

}

    public static Identity<B> Bind<A, B>(this Identity<A> a, Func<A, Identity<B>> func)

{

    return func(a.Value);

}

​

}