nuget packages element is not declared warning

Question

not a showstopper but when using nuget in a project  it creates a packages config file with this shape   lt  xml version  1 0  encoding  utf-8   gt   lt packages gt         your packages  lt  packages gt     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

User · Answer

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

User · Answer

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

User · Answer

You will see it only when the file is open  When you ll close the file in Visual Studio the warnings goes away  http   nuget codeplex com discussions 261638

User · Answer

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

User · Answer

This works and remains even after adding a new package   Add the following  DOCTYPE above the  lt packages  element    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

User · Answer

You can always make simple xsd schema for  packages config  to get rid of this warning  To do this  create file named  packages xsd      lt  xml version  1 0  encoding  utf-8    gt   lt xs schema xmlns xs  http   www w3 org 2001 XMLSchema  elementFormDefault  qualified        targetNamespace  urn packages  xmlns  urn packages  gt     lt xs element name  packages  gt       lt xs complexType gt         lt xs sequence gt           lt xs element name  package  maxOccurs  unbounded  gt             lt xs complexType gt               lt xs attribute name  id  type  xs string  use  required    gt               lt xs attribute name  version  type  xs string  use  required    gt               lt xs attribute name  targetFramework  type  xs string  use  optional    gt               lt xs attribute name  allowedVersions  type  xs string  use  optional    gt             lt  xs complexType gt           lt  xs element gt         lt  xs sequence gt       lt  xs complexType gt     lt  xs element gt   lt  xs schema gt    Location of this file  two options    In the same folder as  packages config  file  If you want to share packages xsd across multiple projects  move it to the Visual Studio Schemas folder  the path may slightly differ  it s  D  Program Files  x86  Microsoft Visual Studio 10 0 Xml Schemas for me     Then  edit  lt packages gt  tag in packages config file  add xmlns attribute     lt packages xmlns  urn packages  gt    Now the warning should disappear  even if packages config file is open in Visual Studio

User · Answer

Actually the correct answer to this is to just add the schema to your document  like so   lt packages xmlns  http   schemas microsoft com packaging 2010 07 nuspec xsd  gt       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

[xml] nuget 'packages' element is not declared warning

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