C#源代码生成器-警告CS8032 : An instance of analyzer cannot be created

Question

我正在尝试构建一个Source Generator。现在，只有最基本的静态方法返回“Hello World”。
生成器项目已构建，但是生成的代码不可用，调试器从不启动，并且构建输出显示

CSC : warning CS8032: An instance of analyzer Generator.StaticPropertyEnum.helloWorld cannot be created from ...\bin\Debug\net5.0\Generator.StaticPropertyEnum.dll : 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..

我引用的示例

Roslyn Team Generator Sample Project

Roslyn Team Generator Cookbook

Generator.Equals Project

How To Debug C# 9 Source Generators

我试过了

更改生成器和测试项目的TargetFramework和LanguageVersion

引用了许多版本的分析器库Microsoft.CodeAnalysis.CSharp和Microsoft.CodeAnalysis.Analyzers

引用Microsoft.Net.Compilers.Toolset的显式版本

向NetStandard库

添加显式引用

从零开始，使用分析仪项目模板

寻找一个生成器项目模板(但没有找到)

版本号
Visual Studio:版本16.8.3
.NET SDK:5.0.101
代码
Generator.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.9.0-2.final" PrivateAssets="all" />
    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.0.0" PrivateAssets="all" />
  </ItemGroup>
 
</Project>

测试csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>

    <IsPackable>false</IsPackable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
    <PackageReference Include="xunit" Version="2.4.1" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <PackageReference Include="coverlet.collector" Version="1.3.0">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\Generator.StaticPropertyEnum\Generator.StaticPropertyEnum.csproj"  OutputItemType="Analyzer" ReferenceOutputAssembly="false"/>
  </ItemGroup>

</Project>

生成器

    [Generator]
    public class helloWorld : ISourceGenerator
    {
        public void Execute(GeneratorExecutionContext context)
        {


            context.AddSource("HelloWorld-generated.cs", @"
            using System;
            namespace HelloWorld
            {
                public static class Hello
                {
                    public static string SayHello() {
                        return ""HelloWorld"";
                    }
                }
            }");
        }

        public void Initialize(GeneratorInitializationContext context)
        {
#if DEBUG
            if(!Debugger.IsAttached) Debugger.Launch();
#endif
        }
    }

Answer 1

源生成器必须是.Net Standard 2.0才能在Visual Studio中运行。