How to remove all namespaces from XML with C#?

Question

I am looking for the clean, elegant and smart solution to remove namespacees from all XML elements? How would function to do that look like?

Defined interface:

Answer 1

Bit late to the party on this one but here's what I used recently:

var doc = XDocument.Parse(xmlString);
doc.Root.DescendantNodesAndSelf().OfType().Attributes().Where(att => att.IsNamespaceDeclaration).Remove();

(taken from this MSDN Thread)

Edit As per the comment below, it appears that while this removes the namespace prefix from the nodes it doesn't actually remove the xmlns attribute. To do that you need to also reset the name of each node to it's localname (eg name minus namespace)

foreach (var node in doc.Root.DescendantNodesAndSelf().OfType())
{
    node.Name = node.Name.LocalName;
}