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.NET Compiler Platform ("Roslyn") Analyzers

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This repository contains a number of Roslyn diagnostic analyzers initially developed to help flesh out the design and implementation of the static analysis APIs. They have been migrated from the main dotnet/roslyn repository in order to continue and speed their further development.

Pre-release builds are available on MyGet gallery:

Windows Debug Windows Release
master Build Status codecov Build Status



Created by summer 2015 interns Zoë Petard, Jessica Petty, and Daniel King

The MetaCompilation Analyzer is an analyzer that functions as a tutorial to teach users how to write an analyzer. It uses diagnostics and code fixes to guide the user through the various steps required to create a simple analyzer. It is designed for a novice analyzer programmer with some previous programming experience.

For instructions on using this tutorial, see Instructions.


Latest stable version: NuGet

Provides guidelines for using .NET Compiler Platform ("Roslyn") APIs.

More info


Latest stable version: NuGet

Provides common code quality guidelines.

More info


Latest pre-release version: NuGet

Experimental package based on Dataflow Analysis to provide code quality guidelines in executable code.

More info


Latest stable version: NuGet

Analyzers for APIs specific to .NET Core.

More info


Latest stable version: NuGet

Analyzers for APIs specific to the desktop .NET Framework.

More info


Latest stable version: NuGet

Contains analyzers specific to the .NET Compiler Platform ("Roslyn") project.

More info


Latest stable version: NuGet

Contains analyzers for text included in code, such as comments.

Getting Started

  1. Clone the repository
  2. Restore and build: build.cmd
  3. Execute tests: test.cmd

Submitting Pull Requests

Prior to submitting a pull request, ensure the build and all tests pass using using steps 2 and 3 above.

Versioning Scheme for Analyzer Packages

See for the versioning scheme for all analyzer packages built out of this repo.

Recommended version of Analyzer Packages

Recommended Visual Studio Version: Visual Studio 2017 15.5 Preview5, RTW or later

Recommended Analyzer Package Version: Version 2.6.2, for example

Due to the fact that large number of our analyzers were based on the not-yet-shipped IOperation APIs in Roslyn, they were in beta stage and tied to a specific compiler/Visual Studio version. IOperation API shipped in Visual Studio 2017 15.5 Preview5, and we have released fully supported version 2.6.0 analyzer packages that should work on all future compiler/Visual Studio versions. Please use the following guidelines when choosing the version of analyzer packages to use on a specific version of Visual Studio/compiler toolset:

  1. Visual Studio 2015 RTW: Analyzer package Version 1.0.1, for example
  2. Visual Studio 2015 Update 1: Analyzer package Version 1.1.0, for example
  3. Visual Studio 2015 Update 2 and 3: Analyzer package Version 1.2.0-beta2, for example
  4. Visual Studio 2017 RTW (15.0), 15.1 and 15.2: Analyzer package Version 2.0.0-beta2, for example
  5. Visual Studio 2017 15.3: Analyzer package Version 2.3.0-beta1, for example
  6. Visual Studio 2017 15.5 Preview5, RTW or later: Analyzer package Version 2.6.2, for example

On Visual Studio 2017 15.5 and later releases, you can also install a custom Microsoft Code Analysis VSIX containing these analyzers as a Visual Studio extension for all your managed projects. See details here: