XDocument.Element returns null when parsing an xml string

Question

I have this xml string:

Answer 1

Get the namespace somehow, like

XNameSpace a = doc.Root.GetDefaultNamespace();

or, probably better:

XNameSpace a = doc.Root.GetNamespaceOfPrefix("a");

and then use it in your queries:

// to get 
XElement f = doc.Element(a + "feed");

You can also set the namespace from a literal string, but then avoid var.