This one is the Source code of ConfuserDUmper by cob258 (B@S) for dumping applications packed by Confuser 1.9 original version.
Clone the repo, and use Visual Studio to build it. And you will know what to do with the rest.
I posted here since many people asked, and this source code was exist, for a while. I'm not the author, so all credits go to the main author (cob258).
Note: Some cases it works, some cases it doesn't so use it in your own risk and if you can, just try to improve it.