We were unable to automatically build your code. Please replace the call to the autobuild action with your custom build steps. Encountered a fatal error while running "/opt/hostedtoolcache/CodeQL/2.25.1/x64/codeql/csharp/tools/autobuild.sh". Exit code was 1 and last log line was: Error: Could not auto-detect a suitable build method. See the logs for more details.

The variable 'ex' is declared but never used