Represents a data collection that allows for loading its data items on demand. The collection
exposes events and API that notifies the user when data items at specific indexes have to be loaded
and allows them to load the data into the collection when it is received.
Namespace: Telerik.Windows.DataAssembly: Telerik.Windows.Controls.Primitives
(in Telerik.Windows.Controls.Primitives.dll) Version: 2013.1.422.2040 (2013.1.0422.2040)