pass different LINQ objects (by string name?) to the same(form-)constructor

[Lextendo]

Hi,

This is what I want to achieve:
I hav a lookup-form used by different parent forms to present a
database table. So form X uses the lookup to search table tblA, form Y
uses the lookup to search tblB.

The data in the lookup form is fetched using a linq to sql context
class and its containing object, so each parent form should pass the
required context class to the lookup form. I tried the approach of
sending the datacontext and recordobject class string names to the
lookup form constructor

So this specific tblRole query:
ExampleProject.Database.RoleDataContext _db = new
ExampleProject.Database.RoleDataContext();
var RoleList =
from Role in
_db.GetTable<ExampleProject.Database.tblRole>()
select new { Role.RoleID, Rol.RoleDescription };

Should be something generic like

[?contextObject?] _db = new [?contextObject?] ();
var ObjectList =
from MyObject in _db.GetTable<[?recordObject?]>()
select new { MyObject.[?MyObjectID?], Object.[?
MyObjectDescription?]};
The ID and Description are always tablenameID and
tablenameDescription. In fact all the supporting tables approached by
the lookup form will have the same structure.
The data is then presented in a grid, where the ID is returned to the
parent when the user selects a record.

So two questions:
1 Am I on the right track here, or is this not a viable solution
(passing the stringname of the context/recordobject)
2 How can it be done (example code would be very much appreciated ;)

regards,
Alex