Top 20 NuGet analyzers Packages

Code Analyzers for projects using xUnit.net that help find and fix frequent issues when writing tests.
Analyzers which spot bugs and code smells in your code. This package is best used together with SonarLint for Visual Studio (http://vs.sonarlint.org) and/or the SonarQube platform (http://www.sonarqube.org).
Advanced Async/Await Diagnostics and CodeFixes for C#.
Roslyn-based analysis for code using the Serilog logging library. Checks for common mistakes and usage problems.
A analyzer library for C# that uses Roslyn to produce refactorings, code analysis, and other niceties. This is a community project, free and open source. Everyone is invited to contribute, fork, share and use the code. No money shall be charged by this software, nor it will be. Ever.
Text Analyzers
Guidelines for using Google Stackdriver Instrumentation Libraries for ASP.NET Core.
Analyzers which spot bugs and code smells in your code. This package is best used together with SonarLint for Visual Studio (http://vs.sonarlint.org) and/or the SonarQube platform (http://www.sonarqube.org).
Static code analyzer to detect common mistakes or potential issues on the C# code that uses Visual Studio SDK APIs.
A way to make it easier to create and work with immutable classes in Bridge.NET
Security static code analyzer for .NET
Microsoft FxCop rules implemented as analyzers using the .NET Compiler Platform (Roslyn).
Analyzers to help writing fluentassertions the right way.
A analyzer library for Visual Basic that uses Roslyn to produce refactorings, code analysis, and other niceties. This is a community project, free and open source. Everyone is invited to contribute, fork, share and use the code. No money shall be charged by this software, nor it will be. Ever.
NET Compiler Platform ("Roslyn") analyzer to disallow calling object.ToString() on types lacking an override.
A style checker implementing various style checks for C# code - some rules being more esoteric than others.
Guidelines for using .NET Compiler Platform (Roslyn) APIs.
Roslyn.Diagnostics Analyzers
General purpose Roslyn-based static code analysis rules for C#. While not intended to be an exact replacement for StyleCop, many of the individual diagnostics are similar to StyleCop rules.
Analyzers for APIs specific to the full .NetFramework which are not present in .NetCore.