我有一个包含两个项目的解决方案，一个针对 4.7.2，一个针对 netstandard2.0。我可以在 Visual Studio 2019 中很好地构建解决方案。但是，当我运行dotnet build MySolution.sln它时，它会失败，并出现与该项目中引用的 nuget 包相关的一些“命名空间类型 ... 不存在”错误。
src\MyService\Authenticator.cs(2,17): error CS0234: The type or namespace name 'Extensions' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?) [src\MyService\MyService.csproj]
src\MyService\Authenticator.cs(5,23): error CS0234: The type or namespace name 'Json' does not exist in the namespace 'System.Net.Http' (are you missing an assembly reference?) [src\MyService\MyService.csproj]
src\MyService\Authenticator.cs(7,7): error CS0246: The type or namespace name 'Flurl' could not be found (are you missing a using directive or an assembly reference?) [src\MyService\MyService.csproj]
所有源代码都可以在https://github.com/marknadig/TestBuild获得。
第一个项目“MyService”是一个 .net 4.7.2 类库项目。
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{3C5D1FFA-5620-4BE0-B79F-801DAD8B176A}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>MyService</RootNamespace>
<AssemblyName>MyService</AssemblyName>
<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
<Deterministic>true</Deterministic>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Core" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
<Reference Include="Microsoft.CSharp" />
<Reference Include="System.Data" />
<Reference Include="System.Net.Http" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Authenticator.cs" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Flurl.Http">
<Version>3.2.0</Version>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.Logging">
<Version>5.0.0</Version>
</PackageReference>
<PackageReference Include="System.Net.Http.Json">
<Version>5.0.0</Version>
</PackageReference>
<PackageReference Include="System.Text.Json">
<Version>5.0.2</Version>
</PackageReference>
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\AuthenticatorService\AuthenticatorService.csproj">
<Project>{cce9bb31-d3e8-4573-8e3a-4ce0bf793fa1}</Project>
<Name>AuthenticatorService</Name>
</ProjectReference>
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
如您所见，MyService 项目引用了针对“netstandard20”的 AuthenticatorService 项目。
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFrameworks>netstandard2.0</TargetFrameworks>
<AssemblyName>AuthenticatorService</AssemblyName>
<RootNamespace>AuthenticatorService</RootNamespace>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.Extensions.Logging" Version="5.0.0" />
</ItemGroup>
</Project>
dotnet --version报告5.0.402
如何让 dotnet build 构建？