---
id: tree-sitter-c-sharp
version: "0.23.5"
license: MIT
license_treatment: permissive
maintenance: active
---

# tree-sitter-c-sharp — C# grammar for tree-sitter

License: permissive · Maintenance: active · Downloads: 10.7M/mo

## What it is and what it does

tree-sitter-c-sharp is a language grammar binding that plugs C# parsing into the tree-sitter incremental parsing framework. It translates the Roslyn C# grammar into tree-sitter's format, with adaptations to handle preprocessor directives, syntax fragments, and edge cases where the two parsing technologies differ. The result is a fast, incremental parser that builds abstract syntax trees for C# code without external dependencies.

You use it by installing the package and importing the language binding. It's designed for tools that need to analyze, transform, or highlight C# syntax—editors, linters, code generators, or language servers—where incremental re-parsing on edits is valuable. The package supports C# 1 through 13.0, with a documented exception for `async`, `var`, and `await` as identifiers in certain contexts.

Use it for:

- Build a C# code linter or style checker that re-parses only changed sections on each edit.
- Implement syntax highlighting or code folding in an editor or IDE plugin using incremental parsing.
- Generate C# AST data for static analysis, refactoring tools, or code generation pipelines.
- Create a language server protocol implementation for C# with incremental parsing support.
- Parse C# code fragments (snippets, REPL input) without requiring a full compilation context.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides a C# language parser for tree-sitter, enabling incremental syntax analysis and parsing of C# code from versions 1 through 13.0.

Yes. The package is actively maintained, has no known vulnerabilities, carries a permissive MIT license, and fills a specific need for incremental C# parsing in the tree-sitter ecosystem. Install it if you're building tools that parse or analyze C# code and want fast, dependency-light syntax tree generation. The medium install friction is offset by broad platform support and zero runtime dependencies.

## Install

pip install tree-sitter-c-sharp
uv add tree-sitter-c-sharp
poetry add tree-sitter-c-sharp

## Installing tree-sitter-c-sharp

Before you install: Medium install friction due to precompiled wheels across multiple platforms (macOS, Linux, Windows, ARM64), but no runtime dependencies and active maintenance with a recent release.

License in practice: MIT license permits free use, modification, and distribution with minimal restrictions, making it suitable for both open-source and commercial projects.

Quickstart:

pip install tree-sitter-c-sharp

from tree_sitter_c_sharp import language

Requires Python 3.9 or later; tree-sitter core library must be installed separately.

Verify before relying:

- Whether the parser handles all C# 13.0 features or only those explicitly tested in the grammar
- Performance characteristics for large codebases or real-time parsing scenarios
- Compatibility with specific tree-sitter versions or API stability guarantees
- How to instantiate and use the language binding with tree-sitter's Parser interface

## Package facts

- License: MIT (permissive)
- Python support: supports_current
- Install friction: medium
- Maintenance: active
- Downloads: 10.7M/month (top 5,000 on PyPI)
- Known vulnerabilities: none known

## Tags

c# parser tree-sitter, incremental c# parsing, c# syntax tree analysis, tree-sitter language grammar, c# code parsing library, c# grammar binding, c# ast generation, parser, c-sharp, syntax-tree

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