“NotSupportedException” when WebRequest is unable to find a creator for that prefix
Try this hacky workaround on this issue: private static HttpWebRequest CreateWebRequest(Uri uri) { var type = Type.GetType(“System.Net.HttpRequestCreator, System, Version=4.0.0.0,Culture=neutral, PublicKeyToken=b77a5c561934e089”); var creator = Activator.CreateInstance(type,nonPublic:true) as IWebRequestCreate; return creator.Create(uri) as HttpWebRequest; }