How to take screenshot of div from a webpage using C# and ASP.NET?

I would like to create dynamic images from html that I’m generating on website. I have code that generates a PSN Trophy Card, ab Xbox LIVE Gamer Card, a Steam Gamer Card, and an Xfire Gamer Card. Each card is put into its own div and built dynamically from server side code. Is there a way to capture a screenshot of a selected div on a webpage using C# and ASP.NET?

WebBrowser.DrawtoBitmap() generating blank images for few sites consistently

I’ve been using WebBrowser.DrawtoBitmap() in my asp.net page running in separate STA thread to capture web pages as an image. But I found that I’m getting blank images for few sites consistently. I’m aware that the method is not ‘officially’ supported but it would be nice if someone can provide me any reason or a work around for these blank images issue.