Lightbox and the .NET version
http://www.codeplex.com is a great community site with many developers contributing various types of awesome applications. That is where I stored my Reminder.NET project, which was discussed on the Extreme Programming blog.
One of them that I downloaded and tried is the Lightbox.NET utility, which wraps the existing javascript file project (called Lightbox) into a .NET class. This is a great feature because it uses javascript to open up modal forms, which you can see the picture in full-screen in a modal form, then press x or click the close link to close it.
The utility will install javascript and other needed files in a lightboxNet folder in the web project, which is created by the component itself upon running the project you reference it in.