ASP.NET query a XML file

Hi Experts I have a XML resultset from Google Maps API from this URL http://maps.googleapis.com/maps/api/geocode/xml?address=Leeds%20Train%20Station&sensor=false Hower I only want to return the address component that has a type of postal_code_prefix and postal_code and the formatted_address Is this possible and how? Please find the code I am currently using. It returns everthing

Const URLString As String = "http://maps.googleapis.com/maps/api/geocode/xml?address=Leeds%20Train%20Station&sensor=false"
        Dim reader As XmlTextReader = New XmlTextReader(URLString)
        Do While (reader.Read())
            Select Case reader.NodeType

                Case XmlNodeType.Element 'Display beginning of element.
                    Response.Write("<" & reader.Name)
                    If reader.HasAttributes Then 'If attributes exist
                        While reader.MoveToNextAttribute()
                            'Display attribute name and value.
                            Response.Write("'{0}'='{1}'", reader.Name, reader.Value)
                        End While
                    End If
                    Response.Write(">")

                Case XmlNodeType.Text 'Display the text in each element.
                    Response.Write(reader.Value)
                Case XmlNodeType.EndElement 'Display end of element.
            End Select
        Loop

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