How to force WebRequest to send Authorization header during POST

Question

When using WebRequest to send a POST, the Authorization header is not sent with the request even though I have manually set the header and set PreAuthenticate to true, eg:

Answer 1

Try this, but there should be no space between the authorization headers.

var authHeader = "OAuth  oauth_consumer_key=bFPD...";
webRequest.Headers.Add("Authorization", authHeader);