Dynamically Generate an Outlook Reminder Using ASP.NET

There was a project I had worked on where the requirement was to allow users to sign up for an event (an online scheduler). They chose an available time slot, and then were sent an email confirmation of the time slot they had signed up for. After it was done, I thought it would be nice if from the confirmation email, the user could click on a link and it would create a reminder for them in Microsoft Outlook. My solution was to create another page in my web app, which would take an ID as a querystring variable that represented the timeslot the user had signed up for, and return a vCalendar File (.vcs). So in the generated email confirmation, at the bottom I had a link to a page like this... http://MyIntranet/Scheduler/vCalendarFile.aspx?ID=12345.

Here is the code needed to make a page like vCalendarFile.aspx...

vCalendarFile_generation.txt