CSharpShredder: Troubleshooting & Common Pitfalls

From Zero to Pro with CSharpShredder

Introduction

CSharpShredder is a tool designed to transform C# projects by automating code optimization, refactoring, and size reduction while preserving behavior. This guide takes you from a beginner’s first steps to advanced workflows that integrate CSharpShredder into daily development and CI pipelines.

1. Getting Started

• Install: Download the latest release or add via NuGet package CSharpShredder.
• Project compatibility: Works with .NET Core and .NET Framework projects that compile with Roslyn.
• First run: Run csharpshredder analyze in your project directory to generate an initial report of optimization opportunities.

2. Key Features You Should Know

• Dead code elimination: Removes unused methods, classes, and fields.
• Method inlining: Replaces small method calls with their bodies where safe.
• Constant folding & propagation: Precomputes constant expressions.
• Refactoring hints: Suggests moving methods, renaming for clarity, and simplifying complex expressions.
• Size-reduction modes: Aggressive (max size reduction), balanced (performance + size), and safe (minimal behavioral risk).

3. Workflow: From Analysis to Commit

1. Analyze: csharpshredder analyze –format json to produce a machine-readable report.
2. Review: Open the report and inspect suggested removals and refactors. Prioritize items flagged as high risk.
3. Apply: csharpshredder apply –mode balanced to automatically apply safe changes.
4. Run tests: Execute your test suite (unit, integration, UI) to detect regressions.
5. Code review: Submit a PR with the changes and display the shredder report for reviewers.
6. Merge: Merge only after tests and review pass.

4. Best Practices

• Version control: Always run CSharpShredder on a feature branch and commit before applying changes.
• Incremental runs: Use conservative modes on large codebases; increase aggressiveness module-by-module.
• Create golden tests: For critical modules, add snapshot tests to ensure behavior remains identical.
• Use CI gates: Add csharpshredder analyze to CI and fail the build for high-risk regressions.
• Skip generated code: Configure the tool to ignore autogenerated files (e.g., designer files, protobuf outputs).

5. Advanced Usage

• Custom rules: Define project-specific rules to preserve reflection-used members or APIs consumed by external plugins.
• Benchmark integration: Run benchmarks before and after applying optimizations to quantify performance changes.
• Refactor templates: Create templates for common refactors (e.g., replace manual null checks with guard helpers).
• Safe mode for libraries: Use the safe profile for published libraries to avoid breaking consumers.

6. Troubleshooting & Rollback

• Unexpected failures: Re-run csharpshredder analyze –verbose to see detailed reasoning for each change.
• Behavioral regressions: Use git bisect between pre- and post-shred commits to isolate the change.
• Rollback: Restore the pre-shred commit or run csharpshredder revert –commit if supported.

7. Real-world Example (Mini Case Study)

• Situation: Medium-sized web API with slow cold-start times and 20% code churn.
• Approach: Run in balanced mode, preserve reflection-bound controllers, add golden tests for auth flows.
• Outcome: 18% binary size reduction, 12% faster startup, no test regressions after two review cycles.

8. Checklist Before Releasing

• Run full test suite (unit + integration).
• Run performance benchmarks.
• Confirm public API contract for libraries.
• Update release notes with shredder changes and reasoning.
• Tag the repository with pre- and post-shred commits.

Conclusion

CSharpShredder can significantly improve code quality and reduce bloat when used carefully. Start conservatively, integrate into CI, and gradually adopt more advanced rules and templates as confidence grows. Following the workflows and best practices above will help you move from zero to pro safely and efficiently.