如何为C#多项目配置Msbuild代码覆盖率阈值，未达标终止构建

Absolutely! The .NET ecosystem has great tools to replicate the Maven+Cobertura threshold enforcement workflow you’re familiar with. Given your specific environment (Visual Studio 2017 Pro, MSBuild 15.3, .NET Framework 4.6.2, NUnit 2.5.7), here are the most practical solutions:

Option 1: OpenCover + ReportGenerator (Open-Source, Free) #

This is the most popular free stack for coverage reporting and threshold enforcement, and it works seamlessly with NUnit 2.x and MSBuild.

Step-by-Step Setup #

1. Install NuGet Packages
   Add these packages to your test project(s):

   • OpenCover (a compatible version for your environment, e.g., 4.7.922)
   • ReportGenerator (e.g., 4.8.12)
   • Ensure you already have NUnit.Runners 2.5.7 installed to run tests via command line.

2. Add MSBuild Target to Your Project/Solution
   Edit your test project’s .csproj file (or create a Directory.Build.props in your solution root to apply to all projects) and add this target to run coverage checks after build:

   <Target Name="EnforceCoverageThreshold" AfterTargets="Build">
     <!-- Collect coverage data with OpenCover -->
     <Exec Command="&quot;$(SolutionDir)packages\OpenCover.4.7.922\tools\OpenCover.Console.exe&quot; 
         -target:&quot;$(SolutionDir)packages\NUnit.Runners.2.5.7\tools\nunit-console.exe&quot; 
         -targetargs:&quot;$(TargetPath) /noshadow&quot; 
         -output:&quot;$(SolutionDir)\Coverage\CoverageResults.xml&quot; 
         -filter:&quot;+[YourProjectNamespace]* -[YourProjectNamespace.Tests]*&quot; 
         -register:user" />
   
     <!-- Generate report and enforce threshold (fails build if below 80%) -->
     <Exec Command="&quot;$(SolutionDir)packages\ReportGenerator.4.8.12\tools\ReportGenerator.exe&quot; 
         -reports:&quot;$(SolutionDir)\Coverage\CoverageResults.xml&quot; 
         -targetdir:&quot;$(SolutionDir)\Coverage\Report&quot; 
         -threshold:80 
         -failOnThreshold" />
   </Target>
   

   • Adjust the filter parameter to include your main project assemblies and exclude test assemblies.
   • Change threshold:80 to your desired minimum coverage percentage. The -failOnThreshold flag will make the Exec task return a non-zero exit code if coverage drops below the threshold, causing MSBuild to fail the build.

Option 2: JetBrains dotCover (Commercial, Integrated with ReSharper) #

Since you’re already using ReSharper Ultimate 2017.2, dotCover (JetBrains’ coverage tool) is a natural fit—it integrates smoothly with your existing IDE and supports MSBuild command-line execution.

Step-by-Step Setup #

1. Locate dotCover Command Line Tools
   The dotCover CLI is included with ReSharper Ultimate 2017.2. You’ll find it at:
   C:\Program Files (x86)\JetBrains\ReSharper\v2017.2\dotCover\bin\dotCover.exe

2. Add MSBuild Target
   Add this target to your project file to run coverage checks:

   <Target Name="EnforceCoverageWithDotCover" AfterTargets="Build">
     <!-- Collect coverage data -->
     <Exec Command="&quot;C:\Program Files (x86)\JetBrains\ReSharper\v2017.2\dotCover\bin\dotCover.exe&quot; 
         analyze 
         /TargetExecutable=&quot;$(SolutionDir)packages\NUnit.Runners.2.5.7\tools\nunit-console.exe&quot; 
         /TargetArguments=&quot;$(TargetPath) /noshadow&quot; 
         /Output=&quot;$(SolutionDir)\Coverage\CoverageResults.dcvr&quot; 
         /Filters=&quot;+:* -:*.Tests&quot;" />
   
     <!-- Generate report and enforce threshold -->
     <Exec Command="&quot;C:\Program Files (x86)\JetBrains\ReSharper\v2017.2\dotCover\bin\dotCover.exe&quot; 
         report 
         /Source=&quot;$(SolutionDir)\Coverage\CoverageResults.dcvr&quot; 
         /Output=&quot;$(SolutionDir)\Coverage\Report.html&quot; 
         /ReportType=Html 
         /Threshold=80 
         /FailIfCoverageIsLessThanThreshold" />
   </Target>
   

   • The /FailIfCoverageIsLessThanThreshold flag ensures the build fails if coverage doesn’t meet your threshold.

Key Notes for Your Environment #

• NUnit 2.5.7 Compatibility: Both OpenCover and dotCover support NUnit 2.x runners, so you won’t need to upgrade your test framework for this feature.
• MSBuild Integration: By adding these targets to your project files, the coverage check will run automatically whenever you build via Visual Studio or the msbuild command line.

内容的提问来源于stack exchange，提问作者Abdul Jabbar