insert issue

[Tauseef A]

hi , i am new to linq actually i have two tables named tbl1 and tbl2 , in tbl1 i have two fileds id(primarykey) and name and in tbl2 i have filelds address and id and id here is foreign key , where i insert record by creating object to tble2 so upon submitchanges it gives error that in tbl1 name should not be null as it is net to not null,why it goes to insert rows in tbl1 i am just adding rows in tbl2 , is there any way to resolve this issue , regards .

Tauseef A Khan MCP Dotnet framework 2.0.