Question

Here is my problem,
I want to get the ID from what I just inserted and use it as a foreign key for another table.

Records record = new Records {
  field1 = 1;
  field2 = 2; 
}; 
DataContext.Records.InsertOnSubmit(record); 
DataContext.SubmitChanges(); // transaction 1
int recordID = record.ID;

tblDEMO demo = new tblDEMO {
  rID = recordID
  field1 = 1;
}; 
DataContext.tblDEMOs.InsertOnSubmit(demo); 
sparxdc.SubmitChanges(); // transaction 2

My question is, If I do this it will create 2 transactions. How can I rollback the 1st one if the 2nd is fail??

Answer 1

If you are ok with both submits within one transaction:

using (TransactionScope scope = new TransactionScope())
{
    try
    {
        perform first submit
        perform second submit
    }
    finally
    {
        scope.Complete();
    }
}