nuget 'packages' element is not declared warning

user_162325 0
Viewed 109880

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

<?xml version="1.0" encoding="utf-8"?>
<packages>
   ... your packages
</packages>

this gives a warning in VS 

The 'packages' element is not declared.

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 visual-studio xml
8 Answers

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

<packages xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">

...and you're done :)

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

Install-Package NuGet.Manifest.Schema -Version 2.0.0

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

%VisualStudioPath%\Xml\Schemas
user_6734040

The problem is, you need a xsd schema for packages.config.

This is how you can create a schema (I found it here):

Open your Config file -> XML -> Create Schema

enter image description here

This would create a packages.xsd for you, and opens it in Visual Studio:

enter image description here

In my case, packages.xsd was created under this path:

C:\Users\MyUserName\AppData\Local\Temp

Now I don't want to reference the packages.xsd from a Temp folder, but I want it to be added to my solution and added to source control, so other users can get it... so I copied packages.xsd and pasted it into my solution folder. Then I added the file to my solution:

1. Copy packages.xsd in the same folder as your solution

2. From VS, right click on solution -> Add -> Existing Item... and then add packages.xsd

enter image description here

So, now we have created packages.xsd and added it to the Solution. All we need to do is to tell the config file to use this schema.

Open the config file, then from the top menu select:

XML -> Schemas...

Add your packages.xsd, and select Use this schema (see below)

enter image description here

user_82115280

This works and remains even after adding a new package:

Add the following !DOCTYPE above the <packages> element:

<?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>
]>
user_61317700

Sometimes happens when you have an old project version. To solve it follow these steps:

  1. Right click on References and select packages.config toPackageReference..
  2. Click OK
  3. Wait meanwhile project packages is updating
user_99603580
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