dotnet core 2.1：“发现不同版本之间的冲突”。从xunit项目引用Web项目时 [英] dotnet core 2.1: "Found conflicts between different versions of" when referencing a web project from an xunit project

问题描述

当我偶然发现这个奇怪的东西时，我正在将netcore 2.0应用程序升级到2.1。

I was on my way to upgrade a netcore 2.0 app to 2.1 when I stumbled upon this strange thing.

如果我创建一个Web项目，然后创建一个xunit当我使用任何Newtonsoft.Json类时，引用第一个的项目就会出现以下错误：

If I create a web project, and then a xunit project referencing the first one, as soon as I use any Newtonsoft.Json class I get the following error:

/media/data/sas/devel/opt/dotnet-sdk-2.1.401/sdk/2.1.401/Microsoft.Common.CurrentVersion.targets(2110,5): 
warning MSB3277: Found conflicts between different versions of "Newtonsoft.Json" that could not be resolved.  
These reference conflicts are listed in the build log when log verbosity is set to detailed. 
[/media/data/sas/devel/apps/tmp/dotnet-error/test/test.csproj]
  test -> /media/data/sas/devel/apps/tmp/dotnet-error/test/bin/Debug/netcoreapp2.1/test.dll

在我尝试升级的项目中，出现了很多这样的错误。似乎xunit项目正在使用不同版本的软件包，并且它们相互冲突。

In the project I was trying to upgrade I get lots of errors like this. It seems like the xunit project is using diffente versions of the packages and that they colide.

以下是重现错误的步骤：

These are the steps to reproduce the error:

$ dotnet new web -o project
$ dotnet new xunit -o test
$ cd test
$ dotnet add reference ../project/
$ dotnet clean && dotnet build

一切正常，但是如果我将其添加到project / Program.cs

and everything works ok, but if I add this to project/Program.cs

    public static void Main(string[] args)
    {
        CreateWebHostBuilder(args).Build().Run();
        var s = Newtonsoft.Json.JsonConvert.SerializeObject(123);
    }

然后我收到上述警告。

我有什么办法解决这个问题吗？

I there some way to work this out?

BTW

$ dotnet --version
2.1.401

推荐答案

我想我在迁移指南：

https://docs.microsoft。 com / zh-CN / aspnet / core / migration / 20_21？view = aspnetcore-2.1＃rules-for-projects-targeting-shared-runtime

您必须在测试项目中添加对 Microsoft.AspNetCore.App 的程序包引用。

You have to add a package reference to Microsoft.AspNetCore.App in the test project.

为 Microsoft.Asp添加程序包引用NetCore.App 到MyApp.Tests。
有关更多信息，请参见集成测试很难设置，
可能会损坏。

Add a package reference for Microsoft.AspNetCore.App to MyApp.Tests. For more information, see Integration testing is hard to set up and may break on shared framework servicing.

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