Reading xml

Question

Hello, im a quite new c# developer and working on making a real simple weather app by using xml data.

The xml : http://www.yr.no/sted/Norge/Akershus/Nesodden/Fjellstrand/varsel.xml

What i would like to to is to pull out specific nodes like for example Weatherdata/Forecast/Tabular/ and then how to pull the data out from 

<tabular>
<time from="2010-12-16T18:00:00" to="2010-12-17T00:00:00" period="3">

so that i only get time = 2010-12-16

Would really appreciate any help or guidelines ! :)