asp.net - Turn off input validation for a single field -

I have an asp.net 4 site on which I want people to '& lt;' However, in an attempt to block the HTML in a form area, the Net gets in the way of blocking (which sees it). I know that I can completely stop input validation, but I only want to turn it off for this field. Does anyone know an easy way to do this?

You can turn off just the input validation for the whole page. The only solution I can think is to turn off the input validation, and then clear all other (non-password) input fields using something like this.