Anders Lybeckers recently posted this great .NET Analyzer round-up. A few I've seen and highlighted but a couple I'd not, which makes his post one of my favorite kinds... :)
A few recent related posts;
- Refactoring Essentials - Open Source, Cross Platform Refactoring and Analyzers
- Analyze This, Analyze That, Writing .NET Code Analyzers and Fixers
The greatest new feature in Visual Studio 2015 is the .NET compiler platform previously known as Roslyn. The .NET Compiler Platform is an open source compiler for C# and VB with rich code analysis APIs. It enables developers to build code analysis tool like code analyzers, fixes and refactorings.
The community has built a number of packages containing great analyzers, fixes and refactorings. These can be installed either as a Visual Studio 2015 Extension or at project level as NuGet packages.
Refactoring Essentials contains approx. 200 code analyzers, fixes and refactorings
Simple defensive code analyzers like parameter checking.
SonarLint for C# has great analyzers too as Christiaan Rakowski points out in the comments. One of them warns about logical paths that will never be reached or simplified.
Platform Specific Analyzer
With Windows 10 and the new Universal Windows Platform you as the developer need to make sure that the Windows App does not use an API not supported on the platform you are targeting. This is exactly what the Platform Specific Analyzer package does for both C# and VB.
SonarLint has an interesting approach in showing off its capabilities, showing how it can help find bugs and issues in real world projects (like NuGet and Roslyn itself)
And as you might expect, SonarLint is free and open source...