title: how to map a computed column in linq to sql classes
body: <p>How can i map a computed column to my LinqToSql Classes? MSDN tells me to use the expression property however i have no idea how to transform my formula into an expression. </p>
  
  <p>My Problem is that once i create the row using SubmitChanges() every property updates except my computed columns in my object. In which i needed to use for another task.</p>
  
  <p>The formula uses a scalar sql function to compute it, in which it computes the sum of values from another table. Can i convert it or do i have to create my own un-mapped property that computes it for me or refresh my datacontext to get the values?</p>