Selecting Common data from two databables, and checking the common data in Checkbox

Hi,
I have two Databases DataTable dt1 has Id:1,2,3,4, and Name: A,B,C,D
Datable dt2 hhas Id:1,2 and Name A,B.
I have to show all the Names that are in Datable dt1 in the checkbox and the two names selected that are in datatable dt2. That is, in checkbox it will display names A,B,C,D with A and B names selected based on their Ids. Without using Linq.
Thanks,
Rahul
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