blocks|key|3234197|text|这可能是一个引用/路径，VS在重命名时没有更新。它又快又脏，但是如果您对旧项目名称的解决方案文件夹运行Grep，并将其替换为新项目名称，然后在VS中重新打开并编译，那么它应该可以解决您的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3234198|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|$]]

It's probably a reference/path that VS hasn't updated when you renamed. It's quick and dirty but if you run a Grep against the solution folder for the old project name and replace it with the new one and then re-open and compile in VS it should solve your problem.

blocks|key|2237579|text|Visual+Studio创建项目时，会自动将其原始命名空间添加到\Views\web.config中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2237580|<system.web.webPages.razor>
++++<pages+pageBaseType="System.Web.Mvc.WebViewPage">
++++++++<namespaces>
++++++++++++...
++++++++++++...
++++++++++++...
++++++++++++<add+namespace="OriginalProjectNamespace"+/>
++++++++</namespaces>
++++</pages>
</system.web.webPages.razor>|code-block|syntax|javascript|2237581|重命名项目或更改其默认命名空间后，必须在此文件中手动更改它。|2237582|entityMap^0|X|H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

When Visual Studio creates your project, it automatically adds its original namespace to <code>\Views\web.config</code>:

<pre><code>&lt;system.web.webPages.razor&gt;
 &lt;pages pageBaseType="System.Web.Mvc.WebViewPage"&gt;
 &lt;namespaces&gt;
 ...
 ...
 ...
 &lt;add namespace="OriginalProjectNamespace" /&gt;
 &lt;/namespaces&gt;
 &lt;/pages&gt;
&lt;/system.web.webPages.razor&gt;
</code></pre>

After renaming the project or changing its default namespace you must manually change it in this file.

blocks|key|323676|text|转到视图文件夹，打开web配置，然后将名称空间更改为新的名称空间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|323677|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|$]]

Go to the view folder, open the web config then change the namespace to the new namespace.

blocks|key|3234310|text|如果你在Visual+Studio中使用F2/Rename重命名你的项目，并且你使用的是.NET核心，还要检查：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3234311|/Views/_ViewImports.cshtml|code-block|syntax|javascript|3234312|执行深度搜索：(Ctrl+%2B+Shift+%2B+F)，然后在Find+what中添加旧的名称空间。在Look+in中，选择Current+Project+(Including+External+Items)。|offset|length|style|CODE|3234313|这应该会显示更多未由Visual+Studio自动重命名的文件。手动将旧名称空间重命名为新名称空间。|3234314|注意不要盲目地重命名所有内容！不是因为您重命名了项目，它的意思是它也重命名了文件夹结构！有许多关于旧文件夹结构的引用。我强烈建议做渐进式|BOLD|3234315|​|3234316|📷|atomic|3234317|3234318|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/1ad95d747a1ab293ef0906c586e8a233.png|imageAlt^0|0|0|T|9|1D|7|1O|16|0|0|0|F|1T|3|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|18|8|@$I|19|J|1A|K|L]|$I|1B|J|1C|K|L]|$I|1D|J|1E|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|1F|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1G|8|@$I|1H|J|1I|K|Q]|$I|1J|J|1K|K|Q]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1L|8|@]|9|@]|A|$]]|$1|T|3|U|5|V|7|1M|8|@]|9|@$I|1N|J|1O|1|1P]]|A|$]]|$1|W|3|S|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14|15|-4]]]]

If you renamed your project using F2/Rename in Visual Studio and you're using .NET Core, also check:

<pre><code>/Views/_ViewImports.cshtml
</code></pre>

Perform a deep search: (Ctrl + Shift + F), and in <code>Find what</code> add your old namespace. Inside <code>Look in</code>, select <code>Current Project (Including External Items)</code>. 

This should show you more files that were not automatically renamed by Visual Studio. Manually rename the old namespace with the new one.

Careful on blindly renaming everything!!! Not because you renamed the project it means that it also renamed the folder structure!!! There are many references with old folder structures. I strongly recommend doing the renaming gradually

<a href="https://i.stack.imgur.com/a8q6a.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/a8q6a.png" alt="Use Current Project Including External Items"></a>

blocks|key|325615|text|例如，如果您在Privacy.cshtml+cs02046上遇到此错误，只需转到此剃刀页面Privacy.cshtml，将@Privacy.cshtml+PrivacyModel更改为YOUR_RENAME_NAMESPACE.Pages.PrivacyModel|type|unstyled|depth|inlineStyleRanges|entityRanges|data|325616|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|$]]

for example if you have this error on Privacy.cshtml cs02046,
Just go to this razor page Privacy.cshtml, change @model PrivacyModel to [YOUR_RENAME_NAMESPACE].Pages.PrivacyModel

I renamed my project and it would compile before but when I made some changes it stopped working for some reason

the error is

<pre><code>Compiler Error Message: CS0246: The type or namespace name 'Lab4' could not be found (are you missing a using directive or an assembly reference?)
</code></pre>

I made a new project from the template of Lab4 and renamed it to lab5 following the steps here

<a href="http://petermcintyre.com/topics/using-an-app-as-a-template-asp-net-mvc/" rel="noreferrer">http://petermcintyre.com/topics/using-an-app-as-a-template-asp-net-mvc/</a>

I found the source file

<pre><code>Line 28: using Lab4;
Line 29: 
Line 30: 

Source File: c:\Users\Albert\AppData\Local\Temp\Temporary ASP.NET Files\root\4b806faf\de1f1e7\App_Web_index.cshtml.a8d08dba.c_hu0onk.0.cs Line: 28 
</code></pre>

of that but when I try to change the using Lab4 to lab5 and recompile it, the same error happens and that file gets deleted and a new one gets made with the same Lab4 issue. 

Does anyone know the answer?

Compiler Error Message: CS0246: when I renamed my project

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我重命名了我的项目，它以前可以编译，但当我做了一些更改时，它由于某种原因而停止工作错误是Compiler Error Message: CS0246: The type or namespace name 'Lab4' could not be found (are you missing a using direct...

问编译器错误消息: CS0246:当我重命名项目时
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