C# Puzzle No.1 (level: beginner)

Would you like to see a collection which magically creates an item as soon as you ask for it? Well, here it is. The collection is asked to return a value for a key, and volia, you will be informed that the item exists in the collection.

using System;

using System.Collections.Generic;

using System.Collections.Specialized;

using System.Text;

namespace ConsoleApplication

{

    class Program

    {

        static void Main( string[] args )

        {

            NameValueCollection Collection = new NameValueCollection();

            Console.WriteLine( 

                "Does NameValueCollection magically create items? " +

                Collection["foo"] != null ? " Yes, it does!" : "No, it doesn't." 

                );

        }

    }

}

Can you spot the problem in the code?