If you\'re in my position you have a big WebForms applications which have escalated to this unmaintainable thing. Things break when you add new features and you need an inexpens
If i am rigth you have a large web form and want to run some standard end user tests each time you do a new release.
I can recomend the Selenium IDE adon for firefox.
it will allow you to record your user actions, e.g filling in a form, and allow you to replay those actions at any time. an easy way to run some test over a form with differnt data.
For internal code testing write some Unit tests using NUnit