blocks|key|617062|text|这是因为VS不知道这个文件的模式。请注意，此文件更多的是实现细节，而不是通常需要直接打开的文件。相反，您可以使用NuGet对话框来管理安装在项目中的包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|617063|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|$]]

This happens because VS doesn't know the schema of this file. Note that this file is more of an implementation detail, and not something you normally need to open directly. Instead, you can use the NuGet dialog to manage the packages installed in a project.

blocks|key|617122|text|只有当文件打开时，您才会看到它。当您在Visual+Studio中关闭该文件时，警告将消失|type|unstyled|depth|inlineStyleRanges|entityRanges|data|617123|http://nuget.codeplex.com/discussions/261638|offset|length|617124|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|18|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

You will see it only when the file is open.
When you'll close the file in Visual Studio the warnings goes away

<a href="http://nuget.codeplex.com/discussions/261638" rel="noreferrer">http://nuget.codeplex.com/discussions/261638</a>

blocks|key|832695|text|实际上，正确的答案是将模式添加到文档中，如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|832696|<packages+xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">|code-block|syntax|javascript|832697|...and你已经完成了:)|832698|如果XSD尚未缓存且不可用，则可以从NuGet控制台按如下方式添加它|832699|Install-Package+NuGet.Manifest.Schema+-Version+2.0.0|832700|完成此操作后(如下面的注释中所述)，您可能希望将其从当前文件夹移动到位于|832701|%25VisualStudioPath%25\Xml\Schemas|832702|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Actually the correct answer to this is to just add the schema to your document, like so

<pre><code>&lt;packages xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd"&gt;
</code></pre>

...and you're done :)

If the XSD is not already cached and unavailable, you can add it as follows from the NuGet console

<pre><code>Install-Package NuGet.Manifest.Schema -Version 2.0.0
</code></pre>

Once this is done, as noted in a comment below, you may want to move it from your current folder to the official schema folder that is found in

<pre><code>%VisualStudioPath%\Xml\Schemas
</code></pre>

blocks|key|832749|text|没有一个答案能永久地解决你的问题。如果你进入添加XSD的路径(从Xml菜单中选择"Create+schema")，你最终会遇到包管理器的问题，因为当你添加一个新的包时，它会清理你的packages.config文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|832750|最好的解决方案就是在你不用的时候关闭这个文件来忽略它。|832751|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

None of the answers will solve your problem permanently. If you go to the path of adding XSD (From Xml menu, select "Create schema"), you will end up having problems with the package manager as it will clean up your packages.config file when you add a new package.

The best solution is just ignore by closing the file when you don't use it.

blocks|key|617285|text|这是有效的，即使在添加了一个新的包之后仍然有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|617286|在元素上方添加以下!DOCTYPE：|617287|<?xml+version="1.0"+encoding="utf-8"?>
<!DOCTYPE+packages+[
++<!ELEMENT+packages+(package*)>
++<!ELEMENT+package+EMPTY>
++<!ATTLIST+package
++id+CDATA+#REQUIRED
++version+CDATA+#REQUIRED
++targetFramework+CDATA+#REQUIRED
++developmentDependency+CDATA+#IMPLIED>
]>|code-block|syntax|javascript|617288|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This works and remains even after adding a new package:

Add the following !DOCTYPE above the &lt;packages> element:

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;!DOCTYPE packages [
 &lt;!ELEMENT packages (package*)&gt;
 &lt;!ELEMENT package EMPTY&gt;
 &lt;!ATTLIST package
 id CDATA #REQUIRED
 version CDATA #REQUIRED
 targetFramework CDATA #REQUIRED
 developmentDependency CDATA #IMPLIED&gt;
]&gt;
</code></pre>

not a showstopper but when using nuget in a project, it creates a packages.config file with this shape

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;packages&gt;
 ... your packages
&lt;/packages&gt; 
</code></pre>

this gives a warning in VS 

<pre><code>The 'packages' element is not declared.
</code></pre>

The origin of the problem got something to do with the xml declaration I guess.

Also I think that the default definition package shouldn't throw warnings.

Does anyone know what should I change it to so I don't get this warning? (ie even if I can see it only when the file is open, it also shows as a warning constantly with certain CA rules on.)

nuget 'packages' element is not declared warning

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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在项目中使用nuget时，它会创建一个具有此形状的packages.config文件<?xml version="1.0" encoding="utf-8"?><packages> ... your packages</packages> 这将在VS中给出一个警告The 'packages' element is ...

问nuget 'packages‘元素未声明警告
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