How do I check to see if a program is installed in C# code?

I have a .Net App that I'm using to create a mailbox for a user in Exchange. The problem is, not everyone filling out the form will have the exchange management console installed on their computer for the form to work. I need to find a way to check if the user filling out the form has that program installed and if they do, run my code to add the mailbox and if not show an error message.