ReCAPTCHA MVC lets you embed a CAPTCHA in your web pages in order to protect them against spam and other types of automated abuse.
The primary features of the library are: --> reCAPTCHA API verion 2.0 Support
--> The color theme of the widget. (dark, light)
--> The type of CAPTCHA to serve. (image, button)
--> The language. (hl)
--> MVC 4 and MVC 5 Support
--> Callback