Posted 04 Feb 2013
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i have a ItemSource of an ObservableCollection<ITestObject> and the user can add new rows to my RadGridView.
If the collections contains one item, the GridView takes this type for adding a new one.
In the case that the collection is empty, the user is unable to add one item.
Is there a way to work with collection of interface objects? Or is there a workaround?