Help for reading either 1 elements/tag

i have this set of codes below. I would like to ask how can i change my set of codes to be able to read 2 elements in an 'or' condition, instead of just reading 1 element called 'bt', i need to read another element called 'noRec'. Or do you guys have another way?

VB Code:

Public Sub bookedtim() 'CAN
        ReDim bookedtime(10)
        Dim a As New StringReader(space)
        schk = New XmlTextReader(a)
        schk.WhitespaceHandling = WhitespaceHandling.None
        schk.Read() 'xml
        schk.Read() 'fb
        schk.Read() 'res
        Dim thisn As Integer
        While Not schk.EOF
            If Not schk.IsStartElement Then
                Exit While
            End If
            bookedtime(thisn) = schk.ReadElementString("noRec")
            thisn = thisn + 1
        End While
        ReDim Preserve bookedtime(thisn - 1)
   End Sub