How to cast dataset to strongly typed object, say, List<Location> ?

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XML

C#5.0

Following is my xml file called PropertyInfo.xml :-

<?xml version="1.0" encoding="utf-8" ?>
<PropertyInformation>
<locations>
  <location name="Bombay">
    <Buildings>
      <Building name="Majestic House">
        <Rooms>
          <Room name="Delmonte Conference Room">
            <Capacity>325</Capacity>
          </Room>
          <Room name="Majestic Ballroom">
            <Capacity>150</Capacity>
          </Room>
        </Rooms>
      </Building>
      <Building name="Taj Mahal Palace Hotel">
        <Rooms>
          <Room name="THE LUXURY GRANDE">
            <Capacity>4</Capacity>
          </Room>
        </Rooms>
      </Building>
    </Buildings>
  </location>
  <location name="New York">
    <Buildings>
      <Building name="City Group Center">
        <Rooms>
          <Room name="LeMessurier Hall">
            <Capacity>210</Capacity>
          </Room>
        </Rooms>
      </Building>
    </Buildings>
  </location>
</locations>
</PropertyInformation>

I created following 4 Models to map above xml file :-

public class Room
{
  [XmlAttribute("name")]
  public String Name { get; set; }
  public int Capacity { get; set; }
}

public class Building
{
  [XmlAttribute("name")]
  public String Name { get; set; }
  public List<Room> Rooms { get; set; }
}

public class Location
{
  [XmlAttribute("name")]
  public string Name { get; set; }
  public Building Buildings { get; set; }
}

[XmlRoot("PropertyInformation")]
public class PropertyInformation
{
  [XmlArray("locations")]
  [XmlArrayItem("location")]
  public List<Location> Locations { get; set; }
}

I created following DAL class to load the information from PropertyInfo.xml :-

public class PropertyInfoDal
{
  public List<Location> LoadPropertyInfo()
  {
    DataSet ds = new DataSet();
    XmlSerializer xmlSerializer = new XmlSerializer(typeof(DataSet));
    FileStream readStream = new FileStream("~/App_Data/PropertyInfo.xml", FileMode.Open);
    ds = (DataSet) xmlSerializer.Deserialize(readStream);
    readStream.Close();

    //How to Cast DataSet to Strongly Typed Object( List<Location>) before it gets returned ??
    //I started with this much below
    List<Location> locations = (from row in ds.Tables[0].AsEnumerable()
    select new PropertyLocation
    {
      Name = row.Field<String>("Name"),
      Buildings = ?????
    }).ToList();

    return locations;
  }
}

In above LoadPropertyInfo() method, how to cast DataSet to List<Location> locations before returning "locations" ? Pls help. Thanks!