your preference for Typed DataSets rules in April 2007...

In LINQ to DataSets (as of today), if you query against an untyped datatable...

var Query = 
   from rowData in dtWorkers.AsEnumerable() 
      where rowData.Field<string>("FirstName") == "Kevin" 
       || rowData.Field<decimal>("Salary") > 90000
 select rowData;

If you query against a typed datatable...

var Query = 
   from rowData in dtWorkers.AsEnumerable() 
      where rowData.FirstName == "Kevin" 
       || rowData.Salary > 90000
 select rowData;

Which would you prefer?