Hi,
You should have you Typed DataSets as bussines entities, that means that you bussines logic should comunicate with your UI - in this case web forms - using Typed DataSets. This Dataset represent pieces of your bussines that usually are part of your back end. For example, you can have a typed DataSet for Customers, a Typed DataSet for Orders, a Typed DataSet for OrderDetails, and so on.
Those Typed DataSet should be placed in a separated component that you can call bussinesEntities. So you can use any if these TypedDataSet just adding a reference for that DLL. they can be used at the UI level, bussines logic level or DataAccess layer level.
You can check this link for more information.
Best Regards.
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