LINQ to XML GetDefaultNamespace（）返回null

Question

I'm trying to get the namespace from metadata in this xml document using XDocument:

<?xml version="1.0" encoding="utf=8"?>
<package xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <metadata xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
    <id>NugetName</id>
    <version>1.0.0</version>
    <authors>company</authors>
    <owners>company</owners>
  </metadata>
  <files>
  ...
  </files>
</package>

I've tried to use the GetDefaultNamespace() method from XElement like so:

XNamespace ns = xmlDoc.Root.GetDefaultNamespace();

However I get a null value. I read a few comments that say that because the root namespace has multiple namespaces, it might not be possible to get the namespace of metadata using this method.

I thought to try just grabbing the Attribute from Root.Element("metadata") but because I don't have the namespace that wouldn't work I think.

Any ideas?

PS the reason I won't necessarily know the namespace is because i'm consuming trusted nuspec files and i'm concerned the schema may change.

Answer 1

xmlDoc.Root is the <package> element.
It has no default namespace.

You want xmlDoc.Root.Elements().First().GetDefaultNamespace() .