I am looking for the native .net framework 4.7.2 driver. The package I downloaded from GitHub has mixed framework with net standard code. You may ask why I need the pure .met framework driver, because I am building a ActiveX control which only supports pure met framework code, not mix with .net standard. I have tried to rewrite the pure .net framework code and it works only without any security. When I had username and password in the connection string, it failed. (But the mongo compass can connect to the security added database without any issue)