I am now in a little serious condition.
I changed all exist Http to Rebex.
However, too many 401 response and all upload failures occurred.
Request.PreAuthenticate does not seem to affect other requests.
In the case of the default HttpWebRequest, even if a new HttpWebRequest is created, it does not generate a 401 error because it is processed using the existing authentication.
Each Rebex http request receives a 401 error.
What should I do with Request.PreAuthenticate to handle multiple requests at the same time?
And this is causing upload problems.
When uploading very large files, using 'AllowWriteStreamBuffering = false' will cause an error because of 401 error.
This is normal error, but I believe this problem will be solved if PreAuthentication works properly.
Can you provoide PreAuthenticate related functionality in HttpRequestCreator?