Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/setup-java@v3, actions/setup-dotnet@v2, actions/checkout@v3, actions/cache@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Loops should be simplified using the "Where" LINQ method

'source.GroupBy(n => n).OrderByDescending(n => n.Count()).FirstOrDefault()' is null on at least one execution path.

Refactor this method to reduce its Cognitive Complexity from 16 to the 15 allowed.

Remove this useless assignment to local variable 'resultMatrix'.

Loops should be simplified using the "Where" LINQ method

'source.GroupBy(n => n).OrderByDescending(n => n.Count()).FirstOrDefault()' is null on at least one execution path.

Refactor this method to reduce its Cognitive Complexity from 16 to the 15 allowed.