hello there, i can make your webbrowser app to rotate the proxy and setting up proxy and send request using that proxy. kindly share more detail like, are you using the default .net web browser control or other control ? and type of proxy you using like, simple http/s, socks4, socks5 etc. message to me for more discussion. with my experience, i have made many programs / project on freelancer that work with proxy and send request using it. kindly check my past work for your reference. i would also advice you about the best way to achieve your goal. just approach me with reply. thanks a lot