Telerik UI for Windows Phone by Progress

The RadListPicker control derives from the HeaderedItemsControl, so it is able to display a header above its items. To define a header for the RadListPicker control, use its Header property. It is of type object, so you can assign everything to it - simple strings, UIElements, UserControls etc.

Note that if you want to set multiple UIElements as content of the RadListPicker control, you have to wrap them in a layout control such as Grid, StackPanel, Canvas etc.
If you are using the RadListPicker control in Popup mode, you can define a header for the popup as well. Just use its PopupHeader property.

You can also bind the Header of the RadListPicker control to a data object and use the HeaderTemplate property to define a DataTemplate to visualize the object.

Here is an example.

<telerikInput:RadListPicker x:Name="radListPicker" Header="Country:" VerticalAlignment="Top"></telerikInput:RadListPicker>

Here is a snapshot of the result.

List Picker-Features-Header-01