What is the best/recommended CAPTCHA component for ASP.NET [closed]

Answer 1

I am also using the recaptcha, and it is great!

Here is the link for the ASP.NET plugin/wrapper:

Using reCAPTCHA with ASP.NET

Answer 2

I've been using recaptcha for a couple of sites with great success. I really recommend it.

There is a recaptcha control for asp.net here.

I've also used this captcha with success.