XML : Best way to reckon a xml file type knowing xml structure

I want to read a xml file, and based on some xml structures I already know recognize the type of xml (xml 1, xml 2 or xml 3)

for example, I know 3 xml structures:

xml 1

  <?xml version="1.0"?>  <OS>    <Info>     ...    </Info>  </OS>    

xml 2

  <?xml version="1.0" encoding="UTF-8"?>  <SaData Version="2">    <Cli>    ...    </Cli>  </SaData>    

xml 3

  <?xml version="1.0" encoding="UTF-8"?>  <Init>       <Danit>       ...       </Danit>  </Init>    

So far I have a class XMLBrandRecognitionNode that acts as a string enum for list of xmlTypes (I did it using a list because the number of xml types could grow, for now there are only 3 types)

  Public Class XMLBrandRecognitionNode          Private Key As String          Public Shared ReadOnly xml1 As XMLBrandRecognitionNode = New XMLBrandRecognitionNode("/OS/Info")          Public Shared ReadOnly xml2 As XMLBrandRecognitionNode = New XMLBrandRecognitionNode("/SaData/Cli")          Public Shared ReadOnly xml3 As XMLBrandRecognitionNode = New XMLBrandRecognitionNode("/Init/Danit")          Private Sub New(ByVal key As String)              Me.Key = key          End Sub          Public Overrides Function ToString() As String              Return Me.Key          End Function      End Class    

And then I populate the list as:

  Dim recognitionList As New List(Of XMLBrandRecognitionNode)  recognitionList.Add(XMLTypeN.xml1)  recognitionList.Add(XMLTypeN.xml2)  recognitionList.Add(XMLTypeN.xml3)    

Now the part to classify the file (xml1,xml2,xml3)

  Dim m_xmld As XmlDocument  m_xmld = New XmlDocument()  m_xmld.Load("myXML.xml")    

However I do not know the best way to classify the type, I was thinking on doing a loop and based on the list of nodes that I get return the type

  For Each o As XMLBrandRecognitionNode In recognitionList     Try          child_nodes = m_xmld.GetElementsByTagName(o.ToString)          'maybe a condition or something...       Catch ex As Exception           Continue For     End Try  Next    

What would be the correct way to reckon a xml file type?