If your Linq query does not have a "Where" clause, GDataDB gives an error that Select is not support..
Workaround: add a where class that does not match any rows.
I'm running Visual Studio 2013 Professional, with all updates.
I'm running the latest GDataDB 0.5.0 and latest GDataDB Linq 0.5.0.
Example of the where clause that I had to add:
var rows = from row1 in tbl.AsQueryable()
where !row1.StudentId.Equals("12345")
select row1;
Todd Booth / University of Technology (Luleå, Sweden)