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I tried this walkthrough, and everythig was OK if the Customers table is displayed in "Details" and the related Orders table is in a Gridview mode.
When I display both tables in Details mode, the changes in the Orders table disappear when I want to save a new added record.
What is my mistake/ mistakes and how can I solve this problem?
It already made me mad.
Thanks for you all even if you don't answer.
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