need a c# developer who have experience in desktop application development.

I have a c# source code. It has a tree-view. It's performing some action. I need to rectify a bug in that.

check code in this library

https://media.boschsecurity.com/fs/media/pb/media/partners_1/integration_tools_1/developer/VideoSDK.06.32.0099.x64.msi