Description
openedon Mar 26, 2019
This issue is effectively the same issue @natemcmaster has reported in dotnet/AspNetCore.Docs#9490 (comment) for .NET Core 2.2 -> 3.0 migrations, but the regression goes back to at least 2.1 -> 2.2 upgrades as well:
Preview 1 Known Issue - workaround for NuGet/Home#7342 - projects which do not start with
<Project Sdk="Microsoft.NET.Sdk.Web">will get compiler or runtime errors due to missing Microsoft.AspNetCore.* assemblies. This is most often the case for test projects and class libraries.
Consider the following project structure:
Source
|
\ WebApi
|
\ WebApi.csproj
Tests
|
\ WebApi.Tests
|
\ WebApi.Tests.csproj
and the following definitions for WebApi.csproj and WebApi.Tests.csproj:
WebApi.csproj
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>netcoreapp2.2</TargetFramework>
</PropertyGroup>
<ItemGroup>
<!-- Implicit Version to avoid MSBuild targets warning -->
<PackageReference Include="Microsoft.AspNetCore.All" />
<!--<PackageReference Include="Microsoft.AspNetCore.All" Version="2.2.3" AllowExplicitVersion="true" />-->
</Project>WebApi.Tests.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp2.2</TargetFramework>
<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.0.1" />
<PackageReference Include="xunit" Version="2.4.1" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
</ItemGroup>
<ItemGroup>
<!-- This could really be any ProjectReference that transitively references a metapackage -->
<ProjectReference Include="..\WebApi\WebApi.csproj" />
</ItemGroup>
</Project>If you build the solution, Tests\WebApi.Tests\obj\project.assets.json will show references to Microsoft.AspNetCore.All metapackage for .NET Core 2.1
The only solution is to use AllowExplicitVersion="true":
<PackageReference Include="Microsoft.AspNetCore.All" Version="2.2.3" AllowExplicitVersion="true" />The error message is:
Severity: Error
Code: CS1705
Description: Assembly 'WebApi' with identity 'WebApi, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null' uses 'Microsoft.AspNetCore.Mvc.ViewFeatures, Version=2.2.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' which has a higher version than referenced assembly 'Microsoft.AspNetCore.Mvc.ViewFeatures' with identity 'Microsoft.AspNetCore.Mvc.ViewFeatures, Version=2.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'
Project: WebApi.Tests
File: D:\source\John.Zabroski\Source\WebApi.Tests\CSC
Line: 1
Suppression State: Active