Problems
This section gathers most common issues that occur when working with Telerik Data Access:
I am adding items in the navigation collection property (e.g. adding new Order objects in the customer.Orders collection) but those items are not persisted in the database. What is wrong?
In order to use the collection properties to add items in an one-to-many relationship, you have to explicitly specify the collection navigation property on the target end of the association as managed. Due to performance considerations, by default the collection navigation properties are not managed.