gistfile1.cs

<!--  Date Picker  -->
<toolkit:DatePicker ext:DatePickerExtension.Command="{Binding DateChanged}" />
<!--  Time Picker  -->
<toolkit:TimePicker ext:TimePickerExtension.Command="{Binding TimeChanged}" />
<!--  List Picker  -->
<toolkit:ListPicker DisplayMemberPath="Name"
                    ext:ListPickerExtension.Command="{Binding SelectionChanged}"
                    ItemsSource="{Binding Flowers}" />