Roslyn Analyzer, Code Fix & Code Refactoring Patterns

When to Use

• Adding a new IDE analyzer (IDE0xxx diagnostic)
• Implementing or modifying a CodeFixProvider
• Implementing or modifying a CodeRefactoringProvider
• Writing tests for analyzers, code fixes, or refactorings
• Working with AbstractBuiltInCodeStyleDiagnosticAnalyzer

IDE Diagnostic IDs

All IDE diagnostics use IDE0xxx format, defined as constants in src/Analyzers/Core/Analyzers/IDEDiagnosticIds.cs. Always reference these constants rather than hardcoding string IDs.

Analyzer Patterns

Code Style Analyzer (preferred for IDE diagnostics)

Inherit from AbstractBuiltInCodeStyleDiagnosticAnalyzer — not raw DiagnosticAnalyzer: