XElement.GetPrefixOfNamespace gets the prefix associated with a namespace for this XElement.
Imports <xmlns:aw="http://www.domain.com"> Module Module1 Sub Main() Dim xmlTree As XElement = <aw:Root/> Dim prefix As String = xmlTree.GetPrefixOfNamespace("http://www.domain.com") Console.WriteLine("Prefix: {0}", prefix) End Sub End Module