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"Code complete 2" has been said in a customer class, the list's interface should be hidden, if not used

But in WPF data binding in the Datgrid or Listbox, usually the source of the items = use the customer,

if the customer is received from the list, then list Interfaces can not be hidden ...

Are these two conflicts? How to solve it

Thanks

Who has said that there are no list interfaces like IEnumerable when you Setting itemssource = customers is used, they are used by your listbox, datagrid class to iterate through the items of your archive.

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