title: Determine if foreign key table has any links to primary key table with LINQ & DataTable
body: <p>I have 2 datatables.</p>
  
  <p>One is the master the other is the detail</p>
  
  <p>When someone goes to delete a master record how can I check that there are no rows in my detail datatable that relate to the master table's ID.</p>
  
  <p><strong>UPDATE:</strong> The user has the ability to select more than one master record at a time</p>
  
  <p>I want to use LINQ if possible.</p>
  
  <p>I started looking at DataTable.Rows.Cast()......</p>