blocks|key|4352563|text|我尝试使用vscode直接打开测试项目(而不是打开子文件夹中包含测试项目的根项目)，现在vscode可以识别Xunit。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4352564|然后，我再次使用vscode打开根项目，将Xunit添加到根项目的csproj文件中，在根项目中运行"dotnet+restore“，现在Xunit在测试项目中被识别。|4352565|问题是vscode+(或者是Omnisharp？我不确定)可能只查看根csproj文件，而忽略恰好在子文件夹中的任何csproj文件。|4352566|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I tried opening the test project directly with vscode (instead of opening the root project that contains the test project in a sub folder) and now vscode recognizes Xunit.

I then opened the root project with vscode again, added Xunit to the root project's csproj file, ran "dotnet restore" in the root project and now Xunit is recognized in the test project.

The thing is that vscode (or is it Omnisharp? i'm not sure) probably looks only at the root csproj file and ignores any csproj file that happens to be in a sub folder.

blocks|key|4352576|text|我也有同样的问题。通过在命令面板中输入"Restart+Omnisharp“解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4352577|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue. It was solved by typing "Restart Omnisharp" in the Command Palette.

blocks|key|4353006|text|@areller的解决方案解决了我的问题。我只想对他的回答进行扩展，提供一些示例代码，以防其他人不知道该怎么做(特别是如果您像我一样刚开始使用C#+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4353007|问题所在|4353008|首先，我按照这里的说明开始为.NET核心应用程序https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test编写单元测试|offset|length|4353009|然后我遇到了OP提到的相同问题。|4353010|解决方案|4353011|首先，我尝试了克劳斯的解决方案，重新启动OmniSharp，但它不能解决问题。|4353012|然后，根据@areller的建议，我在Tests.csproj中找到了以下几行|style|CODE|4353013|++<ItemGroup>
++++<PackageReference+Include="Microsoft.NET.Test.Sdk"+Version="15.7.0"+/>
++++<PackageReference+Include="xunit"+Version="2.3.1"+/>
++++<PackageReference+Include="xunit.runner.visualstudio"+Version="2.3.1"+/>
++++<DotNetCliToolReference+Include="dotnet-xunit"+Version="2.3.1"+/>
++</ItemGroup>|code-block|syntax|javascript|4353014|我将其复制并粘贴到根目录的.csproj文件中，因此根.csproj如下所示：|4353015|<Project+Sdk="Microsoft.NET.Sdk">

++<PropertyGroup>
++++<OutputType>Exe</OutputType>
++++<TargetFramework>netcoreapp2.1</TargetFramework>
++</PropertyGroup>

++<ItemGroup>
++++<PackageReference+Include="Microsoft.NET.Test.Sdk"+Version="15.7.0"+/>
++++<PackageReference+Include="xunit"+Version="2.3.1"+/>
++++<PackageReference+Include="xunit.runner.visualstudio"+Version="2.3.1"+/>
++++<DotNetCliToolReference+Include="dotnet-xunit"+Version="2.3.1"+/>
++</ItemGroup>
</Project>|4353016|在那之后，VS代码要求我恢复。VS代码对话框带有一个“恢复”按钮；我点击了它；几秒钟后问题就消失了。|4353017|祝好运!|4353018|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test^0|0|0|O|2A|0|0|0|0|0|J|C|0|0|D|7|R|7|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1E|8|@]|9|@$F|1F|G|1G|1|1H]]|A|$]]|$1|H|3|I|5|6|7|1I|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1J|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1K|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1L|8|@$F|1M|G|1N|P|Q]]|9|@]|A|$]]|$1|R|3|S|5|T|7|1O|8|@]|9|@]|A|$U|V]]|$1|W|3|X|5|6|7|1P|8|@$F|1Q|G|1R|P|Q]|$F|1S|G|1T|P|Q]]|9|@]|A|$]]|$1|Y|3|Z|5|T|7|1U|8|@]|9|@]|A|$U|V]]|$1|10|3|11|5|6|7|1V|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|1W|8|@]|9|@]|A|$]]|$1|14|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|15|$16|$5|17|18|19|A|$1A|1B]]]]

@areller's solution solved my issue. I just want to expand on his answer to provide some sample code, in case there are other people who doesn't know exactly what to do (especially if you just started on C# like I did).

<h1>The Issue</h1>

First, I followed instructions here to start writing unit tests for a .NET Core application:
<a href="https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test" rel="nofollow noreferrer">https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test</a>

Then I encountered the same issue mentioned by OP.

<h1>Solution</h1>

First, I tried Claus' solution by restarting OmniSharp, but it doesn't fix the issue. 

Then, following @areller's suggestion, I found these lines in <code>Tests.csproj</code>:

<pre><code> &lt;ItemGroup&gt;
 &lt;PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" /&gt;
 &lt;PackageReference Include="xunit" Version="2.3.1" /&gt;
 &lt;PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" /&gt;
 &lt;DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" /&gt;
 &lt;/ItemGroup&gt;
</code></pre>

I copied that, and pasted in my root directory's <code>.csproj</code> file, so the root <code>.csproj</code> looks like this:

<pre><code>&lt;Project Sdk="Microsoft.NET.Sdk"&gt;

 &lt;PropertyGroup&gt;
 &lt;OutputType&gt;Exe&lt;/OutputType&gt;
 &lt;TargetFramework&gt;netcoreapp2.1&lt;/TargetFramework&gt;
 &lt;/PropertyGroup&gt;

 &lt;ItemGroup&gt;
 &lt;PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" /&gt;
 &lt;PackageReference Include="xunit" Version="2.3.1" /&gt;
 &lt;PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" /&gt;
 &lt;DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" /&gt;
 &lt;/ItemGroup&gt;
&lt;/Project&gt;
</code></pre>

After that, VS Code asks me to restore. The VS Code dialog came with a "Restore" button; I clicked on that; several seconds later the issue is gone.

Good luck!

blocks|key|4352662|text|将xunit引用添加到根csproj可能是不可取的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4352663|问题所在|4352664|将测试放在单独的csproj中的想法是，它们及其依赖项不会包含在主项目中。但是，将xunit添加到根csproj将导致主项目引用xunit。根据产品的捆绑方式，这将导致不必要地包含xunit+dll和它所依赖的所有dll。|4352665|不幸的是，Omnisharp的嵌套csproj有一个问题。看起来根csproj将声明所有子目录中的所有源文件，即使有嵌套的csproj。这会导致缺少引用错误。|4352666|解决方案|4352667|不要嵌套csproj。请注意Microsoft's+xunit+setup+guide如何将主csproj及其测试csproj放入sln的不同子目录中。|offset|length|4352668|我最初也遇到了这个错误，在重新构建项目以不嵌套csproj之后，错误得到了解决；只有测试csproj引用了xunit。|4352669|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test^0|0|0|0|0|0|E|T|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Z|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|10|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|11|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|12|8|@]|9|@$L|13|M|14|1|15]]|A|$]]|$1|N|3|O|5|6|7|16|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]]]

Adding the xunit reference to the root csproj is likely undesirable.

<h1>The Issue</h1>

The idea of having tests in a separate csproj is that they and their dependencies won't be included in the main project. Adding xunit to the root csproj will however cause the main project to reference xunit. Depending on how the product is bundled, this will cause the xunit dlls and all the dlls it depends on to be included unnecessarily.

Unfortunately, Omnisharp has an issue with nested csproj. It appears the root csproj will claim all source files in all subdirectories, even if there are nested csproj. This causes the missing reference error.

<h1>The Solution</h1>

Do not nest csproj. Note how <a href="https://docs.microsoft.com/en-gb/dotnet/core/testing/unit-testing-with-dotnet-test" rel="noreferrer">Microsoft's xunit setup guide</a> puts the main csproj and its tests csproj into different subdirectories of the sln.

I first ran into this error as well and after restructuring the project to not nest csproj, the error was resolved; with only the tests csproj referencing xunit.

blocks|key|4353098|text|我也有同样的问题。我为我的.Net+5解决方案安装了xunit.extensibility.core+(2.4.1)，它解决了这个问题。xunit.runner.visualstudio+(2.4.3)已经存在。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4353099|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue. I installed xunit.extensibility.core (2.4.1) for my .Net 5 solution and it solved the issue. xunit.runner.visualstudio (2.4.3) was already present.

I'm using Visual Studio Code for a .NET Core Project.
I have an ASP.NET Core Project for which i want to create a separate unit tests project, i created a sub folder and ran

<pre><code>dotnet new xunit
dotnet restore
</code></pre>

When i tried to run it from the cli "dotnet build" "dotnet run" it ran successfully, however in visual studio, it says that it can't find the namespace Xunit

<a href="https://i.stack.imgur.com/G9YWn.png" rel="noreferrer"><img src="https://i.stack.imgur.com/G9YWn.png" alt="enter image description here"></a>
<a href="https://i.stack.imgur.com/kHN9o.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kHN9o.png" alt="enter image description here"></a>

This is very strange because Visual Studio code has worked fine for me so far, it never had problem with dependencies, it only has this problem with Xunit.

Anyone familiar with this issue?

Xunit Namespace Could not be Found in Visual Studio Code

Visual Studio

单元测试

我正在为一个.NET核心项目使用Visual Studio代码。我有一个ASP.NET核心项目，我想为它创建一个单独的单元测试项目，我创建了一个子文件夹并运行dotnet new xunitdotnet restore当我尝试从cli "dotnet build“"dotnet run”运行它时，它运行成功，但是在vi...

问在Visual Studio代码中找不到Xunit命名空间
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