Streaming a vCard on the Fly in ASP.NET with a Custom httpHandler

To continue with my series on httpHandlers I want to cover how to stream a vCard to the user based on a parameter. First let me say that I grabbed the code for the .NET vCard class from a CodeProject.com article. There is also a corresponding vCalendar class. The idea behind a vCard is it is a standard format for sharing information about a person that can be imported directly to applications like Outlook.