title: How can I modify the schema by using Microsoft.Phone.Data.Linq.DatabaseSchemaUpdater?
body: <p>It seems that the DatabaseSchemaUpdater is only used to add new table/column, but it could not be used to modify the database schema.</p>
  
  <p>Can anyone tell me how can I modify the database schema(drop column) by using DatabaseSchemaUpdater? Or other ways to make it happen.</p>