CS8032 在 VS 中使用引用的分析器项目构建解决方案时出现警告
CS8032 Warnings when building solution with referenced analyzer projects in VS
问题
几个星期以来它运行良好，我能够编译和测试项目。几周前，VS 在构建解决方案或任何非分析器的项目时开始显示以下警告：
Warning CS8032 An instance of analyzer Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer cannot be created from D:\Dev\Repos\Azure\Platform\src\Shared\Analyzers\Platform.Shared.Analyzers\bin\Debug\net5.0\Platform.Shared.Analyzers.dll: Exception has been thrown by the target of an invocation
重要事实
- 所有库都在使用 .NET 5（也尝试过 .NET 6 预览，同样的警告）。
- 该项目使用 Directory.Build.props:
引用分析器
<ItemGroup>
<ProjectReference Include="$(MSBuildThisFileDirectory)\Shared\Analyzers\Platform.Shared.Analyzers\Platform.Shared.Analyzers.csproj"
PrivateAssets="all"
ReferenceOutputAssembly="false"
OutputItemType="Analyzer"/>
</ItemGroup>
我试过的
- VS 16.10。 - 警告
- 正在更新到 VS 16.11。 - 警告
- 正在安装 VS 17 预览版 (2022) 并升级到 .NET 6。-警告
- PowerShell
dotnet build 和 dotnet msbuild。 - 无警告
- JetBrains 骑手。 - 无警告
- Azure DevOps 构建代理。 - 无警告
完全警告
我启用了 Fusion Log 以获取完整日志。
来自“错误列表”（为引用分析器项目的每个项目的每个分析器生成一个）：
Warning CS8032 An instance of analyzer Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer cannot be created from D:\Dev\Repos\Azure\Platform\src\Shared\Analyzers\Platform.Shared.Analyzers\bin\Debug\net5.0\Platform.Shared.Analyzers.dll: Exception has been thrown by the target of an invocation.. Platform.Shared.Core 1 Active System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: The type initializer for 'Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer' threw an exception. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..cctor()
--- End of inner exception stack trace ---
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..ctor()
--- End of inner exception stack trace ---
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.CodeAnalysis.Diagnostics.AnalyzerFileReference.Extensions`1.GetAnalyzersForTypeNames(Assembly analyzerAssembly, IEnumerable`1 analyzerTypeNames, Boolean& reportedError)
-----
System.TypeInitializationException: The type initializer for 'Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer' threw an exception. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..cctor()
--- End of inner exception stack trace ---
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..ctor()
-----
Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
-----
=== Pre-bind state information ===
LOG: DisplayName = System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
(Fully-specified)
LOG: Appbase = file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/
LOG: Initial PrivatePath = NULL
Calling assembly : Platform.Shared.Analyzers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
===
LOG: This bind starts in LoadFrom load context.
WRN: Native image will not be probed in LoadFrom context. Native image will only be probed in default load context, like with Assembly.Load().
LOG: Using application configuration file: C:\Users\Shay\AppData\Local\Microsoft\VisualStudio.0_0bee0d9b\devenv.exe.config
LOG: Using host configuration file:
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime/System.Runtime.EXE.
-----
解决方法
作为临时解决方法，我将以下 属性 添加到解决方案 Directory.Build.props:
<PropertyGroup Condition="'$(BuildingInsideVisualStudio)' == 'true'">
<!-- Visual Studio compiler displays the CS8032 warning for unknown reason. Removing it manually to declutter the Error List -->
<NoWarn>$(NoWarn),8032</NoWarn>
</PropertyGroup>
我以前见过这个问题，它的发生是因为您将 .Net 5.0 用于源生成器项目。根据文档 here.
，源生成器的项目只能是 .Net 标准 2.0
问题
几个星期以来它运行良好，我能够编译和测试项目。几周前，VS 在构建解决方案或任何非分析器的项目时开始显示以下警告：
Warning CS8032 An instance of analyzer Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer cannot be created from D:\Dev\Repos\Azure\Platform\src\Shared\Analyzers\Platform.Shared.Analyzers\bin\Debug\net5.0\Platform.Shared.Analyzers.dll: Exception has been thrown by the target of an invocation
重要事实
- 所有库都在使用 .NET 5（也尝试过 .NET 6 预览，同样的警告）。
- 该项目使用 Directory.Build.props: 引用分析器
<ItemGroup>
<ProjectReference Include="$(MSBuildThisFileDirectory)\Shared\Analyzers\Platform.Shared.Analyzers\Platform.Shared.Analyzers.csproj"
PrivateAssets="all"
ReferenceOutputAssembly="false"
OutputItemType="Analyzer"/>
</ItemGroup>
我试过的
- VS 16.10。 - 警告
- 正在更新到 VS 16.11。 - 警告
- 正在安装 VS 17 预览版 (2022) 并升级到 .NET 6。-警告
- PowerShell
dotnet build和dotnet msbuild。 - 无警告 - JetBrains 骑手。 - 无警告
- Azure DevOps 构建代理。 - 无警告
完全警告
我启用了 Fusion Log 以获取完整日志。 来自“错误列表”（为引用分析器项目的每个项目的每个分析器生成一个）：
Warning CS8032 An instance of analyzer Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer cannot be created from D:\Dev\Repos\Azure\Platform\src\Shared\Analyzers\Platform.Shared.Analyzers\bin\Debug\net5.0\Platform.Shared.Analyzers.dll: Exception has been thrown by the target of an invocation.. Platform.Shared.Core 1 Active System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: The type initializer for 'Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer' threw an exception. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..cctor()
--- End of inner exception stack trace ---
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..ctor()
--- End of inner exception stack trace ---
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.CodeAnalysis.Diagnostics.AnalyzerFileReference.Extensions`1.GetAnalyzersForTypeNames(Assembly analyzerAssembly, IEnumerable`1 analyzerTypeNames, Boolean& reportedError)
-----
System.TypeInitializationException: The type initializer for 'Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer' threw an exception. ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..cctor()
--- End of inner exception stack trace ---
at Platform.Shared.Analyzers.Rules.StructuredMessageTemplateAnalyzer..ctor()
-----
Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
-----
=== Pre-bind state information ===
LOG: DisplayName = System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
(Fully-specified)
LOG: Appbase = file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/
LOG: Initial PrivatePath = NULL
Calling assembly : Platform.Shared.Analyzers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
===
LOG: This bind starts in LoadFrom load context.
WRN: Native image will not be probed in LoadFrom context. Native image will only be probed in default load context, like with Assembly.Load().
LOG: Using application configuration file: C:\Users\Shay\AppData\Local\Microsoft\VisualStudio.0_0bee0d9b\devenv.exe.config
LOG: Using host configuration file:
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PublicAssemblies/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Microsoft/TestWindow/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/CommonExtensions/Platform/Debugger/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Program Files (x86)/Microsoft Visual Studio/2019/Professional/Common7/IDE/PrivateAssemblies/DataCollectors/x86/System.Runtime/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime/System.Runtime.DLL.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime.EXE.
LOG: Attempting download of new URL file:///C:/Users/Shay/AppData/Local/Temp/VS/AnalyzerAssemblyLoader/2dfa9a6f85874e39aff972af6188cb73/5/System.Runtime/System.Runtime.EXE.
-----
解决方法
作为临时解决方法，我将以下 属性 添加到解决方案 Directory.Build.props:
<PropertyGroup Condition="'$(BuildingInsideVisualStudio)' == 'true'">
<!-- Visual Studio compiler displays the CS8032 warning for unknown reason. Removing it manually to declutter the Error List -->
<NoWarn>$(NoWarn),8032</NoWarn>
</PropertyGroup>
我以前见过这个问题，它的发生是因为您将 .Net 5.0 用于源生成器项目。根据文档 here.
，源生成器的项目只能是 .Net 标准 2.0