ThinkMeta.CodeAnalysis

Static code analyzer for C#

ThinkMeta.CodeAnalysis.CSharp

Overview

ThinkMeta.CodeAnalysis is a static code analyzer for C# projects, built on Roslyn. It helps developers identify code issues, enforce coding standards, and improve code quality automatically.

Features

• Detects common code issues and anti-patterns
• Supports custom analyzers and code fixes
• Integrates with .NET build and IDE tooling
• Targets .NET Standard 2.0 for broad compatibility

Diagnostics

TM0001: Use pattern matching for null checks

Description:
Warns when using == null or != null for null checks.
Reason:
Pattern matching (is null, is not null) is preferred for clarity and future-proofing code.
How to fix:
Replace == null with is null, and != null with is not null.

Exceptions:
Null checks using == null or != null inside expression trees (e.g., lambdas assigned to Expression<Func<...>>) are not reported by this diagnostic, as pattern matching is not supported in expression trees.

Examples:

// Standard null check if (obj == null) { } // => if (obj is null) { } // Query syntax var q = from o in arr where o == null select o; // => var q = from o in arr where o is null select o; // Razor-generated (in .g.cs from .razor) @if (Model == null) { <text>Empty</text> } // => @if (Model is null) { <text>Empty</text> } // No warning in expression trees Expression<Func<object, bool>> expr = o => o == null; // No diagnostic