Modify then display page using C#

Question

Can someone point me in the right direction for implementing proxy-like behavior with C#? I'm looking to catch HTTP requests from a site, parse, then modify the DOM and show the results. Ideally, this program would run as a proxy on the local machine, but I'm fine with implementing a custom "browser" if needed.

Any suggestions?

Answer 1

What about writing an extension for Fiddler?

Answer 2

I doubt you want a process on the local machine, so how about a Browser Helper Object (BHO)? You should be able to intercept the content before it's rendered and modify it in any way you want. I've only done them in ATL, but a bit of research indicates a C# version is possible.