How do I disable all Roslyn Code Analyzers?

Question

I'm trying to work with a large opensource project that has a handful of Roslyn Code Analyzers. When I open the solution Visual Studio uses ~35% CPU for about 15 minutes. Using PerfView I've figured out that the code analyzers being run on the solution are bogging down Visual Studio.

I know it's possible to disable analyzers on a per-project basis but this solution contains over 100 projects so I'd rather not do this one-by-one.

My question(s):

• Can I disable all Roslyn Analyzers for a given solution to avoid this?
• Can I disable all Roslyn Analyzers for all solutions in Visual Studio?

Solution 1

Try Tools/Options/Text Editor/C#/Advanced and disable full solution analysis. It's only available since VS2015 Update 2.

Solution 2

You can disable analyzers on a per-project basis.

To do it, right click on Project>References>Analyzers in the Solution Explorer and hit Open Active Rule Set

You can disable individual analyzers or entire bundles of analyzers.

This creates a <ProjectName>.ruleset file and modifies the <ProjectName>.csproj, which means that you will share this configuration with your team unless you exclude these changes from source control.

Note: Changes are applied after you close and re-open the solution.

---

Changes to the .csproj:

<Project ...>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <CodeAnalysisRuleSet>Example.ruleset</CodeAnalysisRuleSet>

Example.ruleset file:

<?xml version="1.0" encoding="utf-8"?>
<RuleSet Name="Rules for WpfApplication1" Description="Code analysis rules for WpfApplication1.csproj." ToolsVersion="14.0">
  <Rules AnalyzerId="Microsoft.CodeAnalysis.CSharp" RuleNamespace="Microsoft.CodeAnalysis.CSharp">
    <Rule Id="AD0001" Action="None" />
    <Rule Id="CS0028" Action="None" />
...

Solution 3

Disable below setting in Tools/Options/Text Editor/C#/Advanced and disable use 64-bit process for code analysis under analysis group. it was tested in vs2019.

Solution 4

Try a combo of the following in your csproj or Directory.Build.props files

<RunAnalyzersDuringBuild>false</RunAnalyzersDuringBuild>
<RunAnalyzersDuringLiveAnalysis>false</RunAnalyzersDuringLiveAnalysis>
<RunAnalyzers>false</RunAnalyzers>

https://docs.microsoft.com/en-us/visualstudio/code-quality/disable-code-analysis?view=vs-2019#net-framework-projects

Solution 5

It is possible to reference a ruleset file located in the parent folder

<Project ...>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <CodeAnalysisRuleSet>..\Example.ruleset</CodeAnalysisRuleSet>

This way you could define one ruleset for the entire solution.

View more solutions

Comments

[JoshVarty]

The issue here is that there are hundreds of projects in the solution so I was hoping I wouldn't have to disable them one-by-one. They're also under source control I don't control, so when I pull I believe my changes will be overwritten, right?

[Amadeusz Wieczorek]

I hope there's a way to manage analyzers on a scale of the entire solution. Maybe someone will pitch in.

[Amadeusz Wieczorek]

To go around the source control issues, create a default .ruleset file (so that .csproj is updated) and commit these changes. Then, apply your configuration and follow this guide to keep changes out of git repo

[Maxim]

@JoshVarty, I have installed Update 2 but nothing is available there.

[Tamas]

It's a checkbox in the Editor Helper group.

[HappyNomad]

@rolls It does work. Read here to understand what the checkbox is for.

[rollsch]

Yes but the service is still present and using CPU. So what does that mean?

[S.Serpooshan]

my firewall pops up and shows that RoslynCodeAnalysisService32 is trying to connect to internet, even when full solution analysis is not checked!

[rollsch]

This doesn't actually stop the CPU usage though.

[rollsch]

This doesn't actually stop the CPU usage though.

[Christian Findlay]

This doesn't work with the new Roslyn Analysers NuGet package