S3900 warnings and extension methods

Hey there.

As noted in this post:

Please share this information:

Which product(s) you’re using

  • SonarQube
    • If so, which version of SonarQube?
  • SonarCloud
  • SonarLint
  • If yes, with which IDE and which version?
    • If you’re using Connected Mode, tell us with which product (if it’s SonarQube, see the above notes on providing version details)