Dynamically adding webparts to the dynamically added Catalog zone

This entry shows you how to add webparts dynamically to the Catalog Zone in ASP.NET 2.0. The reason why you may like to do it is because you have a lot of webparts to choose from which you don't want to show up directly when your user logs in. Using this method you can load them dynamically only in the Catalog zone. I had a customer which had a very similar requirement. I found it a good one to share and here it is...