ADO.Net Entity Save

Question

Hello,

         I'm new to 3.5 framework. I'm developing one web based application in asp.3.5. There am using ADO.Net Entity framework for save and update. In my database there is lot table with relationship (Foreign key). My problem is how can we save foreign key field(parent table) value in child table. Because in child table object that key field not displaying. But i want save parent key field value in child table...Please help me.


Thanks,
Aani