How do I get the MAX row with a GROUP BY in LINQ query?

I am looking for a way in LINQ to match the follow SQL Query.

Select max(uid) as uid, Serial_Number from Table Group BY Serial_Number

Really looking for some help on this one. The above query gets the max uid of each Serial Number because of the Group By Syntax.

using (DataContext dc = new DataContext())
{
    var q = from t in dc.TableTests
            group t by t.SerialNumber
                into g
                select new
                {
                    SerialNumber = g.Key,
                    uid = (from t2 in g select t2.uid).Max()
                };
}