No Captcha ReCaptcha 2.0 with ASP.NET using C# is easy to set up and use with this code to stop bots and minimize spammers. Google's new No Captcha ReCaptcha 2.0 with ASP.NET integration will allow everyone running C# for their websites to add this new tool to their arsenal to help combat bots and slow down spammers.
Shahid Shaikh from codeforgeek.com« (Article is no longer available.) His response got me pointed in the right direction.
You will need the new reCaptcha 2.0 Site Key. Go here: https://www.google.com/recaptcha/admin. Add a new Site Key for your website. For local testing, you will have to test with 127.0.0.1/Load.aspx It will not work with a static IP Address or with localhost anymore.