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<city_inventory>
  <city name="New York">
    <nas>Nas1</nas>
    <folder>Folder1</folder>
  </city>
  <city name="Chicago">
    <nas>Nas2</nas>
    <folder>Folder1</folder>
  </city>
  <city name="San Diego">
    <nas>Nas2</nas>
    <folder>Folder1</folder>
  </city>
</city_inventory>					

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var selected=from city in city_inventory where city.Name=="New York"||city.Name=="Chicago"||city.Name=="San Diego" select city.Name;