Performance issue, sftp, c# code

Hello,
I am getting bad results trying to put files with some C# code.
The file is started and stopped over and over again.
I am attaching a debug log, and the code.
What can I do to improve this performance?
I've seen similar posts, but I have not seen any clear answers.
Are there parameters that can be adjusted?
Thanks

Does the upload work in WinSCP GUI?

Does the upload work, if you run your code in a normal interactive Windows session?

yes, it works in a normal winscp session

What do you mean by "normal winscp session"? WinSCP GUI? Or your code in a normal interactive Windows session?
Can you post a session log (not debug log) file from both your code and the working session?