PR Summary

• Autofix RCS1048: Use lambda expression instead of anonymous method
• Autofix RCS1021: Simplify lambda expression
• Cleanup formatting, use discard vars, etc.

PR Context

PR Checklist

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• Summarized changes
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• Breaking changes
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• User-facing changes
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• Testing - New and feature
  • N/A or can only be tested interactively
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  • [NA] Make sure you've added a new test if existing tests do not effectively test the code changed
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