In WPF the use of implicit data templates without an
x:Key makes it easy to associate a template with a particular type of object. You just set the
DataType property of the
DataTemplate to the corresponding type and the template is then applied automatically to all instances of that particular type.
The Universal Windows Platform (UWP) however has no concept of implicit data templates. Each
DataTemplate that you define in a UWP app must have an
x:Key attribute and it must be set to a
Setting the SelectionMode property of a ListView control to Multiple (Windows.UI.Xaml.Controls.ListViewSelectionMode.Multiple) in a Universal Windows Platform (UWP) app enables you to select several items by checking an automatically generated CheckBox element for each item that you want to select: