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

The reply's by Jimmy and Peter were a great help, but they actually removed all attributes, so I made a slight modification:

Imports System.Runtime.CompilerServices

Friend Module XElementExtensions

     _
    Public Function RemoveAllNamespaces(ByVal element As XElement) As XElement
        If element.HasElements Then
            Dim cleanElement = RemoveAllNamespaces(New XElement(element.Name.LocalName, element.Attributes))
            cleanElement.Add(element.Elements.Select(Function(el) RemoveAllNamespaces(el)))
            Return cleanElement
        Else
            Dim allAttributesExceptNamespaces = element.Attributes.Where(Function(attr) Not attr.IsNamespaceDeclaration)
            element.ReplaceAttributes(allAttributesExceptNamespaces)
            Return element
        End If

    End Function

End Module