[c#] problema google Maps XML Iterator

[3nigma666]

Buon di,

io ho questo foglio XML di risposta da una interrogazione di google maps :
<GeocodeResponse>
<status>OK</status>
<result>
<type>street_address</type>
<formatted_address>1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA</formatted_address>
<address_component>
<long_name>1600</long_name>
<short_name>1600</short_name>
<type>street_number</type>
</address_component>
<address_component>
<long_name>Amphitheatre Pkwy</long_name>
<short_name>Amphitheatre Pkwy</short_name>
<type>route</type>
</address_component>
<address_component>
<long_name>Mountain View</long_name>
<short_name>Mountain View</short_name>
<type>locality</type>
<type>political</type>
</address_component>
<address_component>
<long_name>San Jose</long_name>
<short_name>San Jose</short_name>
<type>administrative_area_level_3</type>
<type>political</type>
</address_component>
<address_component>
<long_name>Santa Clara</long_name>
<short_name>Santa Clara</short_name>
<type>administrative_area_level_2</type>
<type>political</type>
</address_component>
<address_component>
<long_name>California</long_name>
<short_name>CA</short_name>
<type>administrative_area_level_1</type>
<type>political</type>
</address_component>
<address_component>
<long_name>United States</long_name>
<short_name>US</short_name>
<type>country</type>
<type>political</type>
</address_component>
<address_component>
<long_name>94043</long_name>
<short_name>94043</short_name>
<type>postal_code</type>
</address_component>
<geometry>
<location>
<lat>37.4217550</lat>
<lng>-122.0846330</lng>
</location>
<location_type>ROOFTOP</location_type>
<viewport>
<southwest>
<lat>37.4188514</lat>
<lng>-122.0874526</lng>
</southwest>
<northeast>
<lat>37.4251466</lat>
<lng>-122.0811574</lng>
</northeast>
</viewport>
</geometry>
</result>
</GeocodeResponse>

di cui devo prendere i seguenti valori:

<geometry>
<location>
<lat>37.4217550</lat>
<lng>-122.0846330</lng>
</location>

37.4217550, -122.0846330

e per prenderli faccio cosi:


private string returnValore(XPathNavigator navigator, string type)
{
XPathExpression expr;

expr = navigator.Compile("/GeocodeResponse/result/geometry/location/"+type); //dove type = lat (latitudine)o lng (longitudine)

XPathNodeIterator iterator = navigator.Select(expr);

iterator.MoveNext()
return iterator.Current.Value.ToString();
}

ma in realtà mi restituisce tutti i valori dentro XMl invece che selezionarmi solo quello che voglio io.

perchè?!?!??!??!