c# - EF6 Updating 3 tables in one go -

i have database 3 tables

table customer

customerid  (pk)  name 

table order

orderid       (pk)  customerid    (fk)  orderdate 

table orderdetailline

orderdetaillineid  orderid       (fk)  price  productcode 

what in entity framework add 1 customer, add several different orders, each many orderdetailline relating first customer inserted. have hooked relationship in sql server , imported them ef model. no problems. can insert 1 customer , many orders , orderdetailline first time records inserted ok correct databse tables

i looping around customer , orders in file adding adding customer , orders database

but when want add order same customer( getting primary key violation on customer customerid). ef trying re-insert same customer after initial context.savechanges();

so, how stop ef trying add same customer when using same datacontext?

i have been going around in circles hours , getting same error

{"the insert statement conflicted foreign key constraint \"fk_order_customer\". conflict occurred in database \"xxxxx\", table \"dbo.customer\", column 'customerid'

the customer newly created along order , orderlines. works first time , customerid ef. when add new order , orderlines after inital context.savechanges(); fk error

thanks taking time.

the problem was calling datacontext.savechanges() adding entities correct model. example,

customer.order.add(customerinfo);

well lack of understanding.