I am trying to develop a method in C# that downloads Recaptcha V2 images and display them in a picturebox in a Windows Form. I asked a question previously on this and so far it's the only answer that has got me anywhere. The issue I am running into now is that whenever I try to download the ReCaptcha V2 image I run into a 400 Bad Request. I have tried tracking the problem with Fiddler, and it says that Cache-control is set to No Cache and that pre-check and post-check tokens are meaningless. Is there a way I can resolve this Fiddler error? I am still a newbie and I can't post any code without triggering the moderation system. I am using HttpWebRequest/httpwebresponse methods.