What's Wrong With This Code? (#14)

Tuesday, April 17, 2007

MSDN says the List.ForEach method will "perform the specified action on each element of the List".

The following program does print out a haiku to the console, but does not make the haiku all lowercase.

using System;

using System.Collections.Generic;

class WWWTC

{

    static void Main()

    {

        List<string> haiku = new List<string>();

        haiku.Add("All software changes");

        haiku.Add("Upon further reflection -");

        haiku.Add("A reference to String");

        // make it lowercase

        haiku.ForEach(

                    delegate(string s)

                    {

                        s = s.ToLower();

                    }

        );

        // ... and now print it out

        haiku.ForEach(

                    delegate(string s)

                    {

                        Console.WriteLine(s);

                    }

        );

    }

}

What's wrong?

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