How to use C# to sanitize input on an html page?

Question

Is there a library or acceptable method for sanitizing the input to an html page?

In this case I have a form with just a name, phone number, and email address.

Code must be C#.

For example:

"<script src='bobs.js'>John Doe</script>" should become "John Doe"

question from:https://stackoverflow.com/questions/188870/how-to-use-c-sharp-to-sanitize-input-on-an-html-page