Linq to SQL和Gridview Datasource

I have a question related to this one. I don't want to do a calculation (aggregation), but I need to get display values from an association. In my C# code, I can directly reference the value, because the foreign key constraint made Linq generate all the necessary wiring. When I specify the IQueryable as the Gridview datasource property, and reference something that is not a column of the primary entity in the result set, I get an error that the column does not exist. As a newbie to Linq, I am guessing the assignment implicitely converts the IQueryable to a list, and the associations are lost. My question is, what is a good way to do this?. I don't