Hi @aalali. Welcome to the community!
SonarQube itself doesn’t know anything about either rulesets or .editorconfig files.
If you are talking about configuration in the IDE, then that is handled by SonarLint for Visual Studio (“SLVS”).
If you are talking about build-time analysis with the analysis results being pushed to SonarQube, then that is handled by the SonarScanner for MSBuild (“S4MSB”).
Currently SLVS and S4MSB only work with rulesets. They don’t handle .editorconfig files.
What are you trying to do?