Linq to SQL - "This member is defined more than once" error.

I have the following linq code...

CMSDataContext dc = new CMSDataContext();

var q = from u in dc.CMSUsers 
        join d in dc.tblDistricts
          on u.DistrictCode equals d.District into orders
        select u;

District shows this error: Ambiguity between 'tblDistrict.District' and 'tblDistrict.District'

Any ideas?

EDIT:

It turns out that I had the same table in two different dbml files. Apparently, I cannot do this. I will have to end up joining a table from one dbml file with another table from a different dbml file. If anyone can enlighten me on how to do this, I will deem it as an answer. Thanks.

From stackoverflow

• If you have a FK releationship between two tables, LINQ-to-SQl will automatically create a property for it.

  For example, if you Order object has a CustomerID which is a Foriegn key to the Customers table, Order will automatically have a Customer property. If you already have a Customer property, there will be a conflict.