In these days, our programmers need to create a simple customer feedback form for our client. As we all know, it's quite simple to do. But, to have good security for our site, we should prevent any spam in advance. That's why how to put Image Captcha in our site. I found following site.

Big Credit to : http://johnadonline.com/?tag=how-to-create-captcha-in-aspnet-c