Complete refactor of StringExtension #21080
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Comprehensive design for splitting the 1,600-line StringExtensions.cs into 5 focused partial class files with performance optimizations. Key decisions: - Partial class approach to prevent breaking changes - 5 files: Culture, Manipulation, Encoding, Parsing, Sanitization - Performance fixes for regex caching and char operations - 4-phase implementation with individual plans and summaries 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Split the 1,600-line StringExtensions.cs into logical categories: - StringExtensions.Culture.cs - invariant comparison methods - StringExtensions.Manipulation.cs - string modification methods - StringExtensions.Encoding.cs - hashing, base64, guid encoding - StringExtensions.Parsing.cs - parsing and detection methods - StringExtensions.Sanitization.cs - XSS, HTML, file path methods No functional changes. All existing tests pass. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Use existing Whitespace Lazy<Regex> instead of creating new Regex each call. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Eliminates string allocations for simple char case checks. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Single-pass StringBuilder instead of multiple string.Replace calls. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Documentation for the StringExtensions refactoring project including the implementation plan, baseline testing results, file split summary, benchmark results, performance fixes, and verification summary. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Comprehensive summary of the refactoring effort including: - Before/after file structure comparison - Performance benchmarks (72% avg improvement) - Test results (144 tests passing) - Commit history and phase summaries 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Branch: refactor/StringExtensions pushed to origin
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