C# :: Open WPF Window From Double Click On Selected Item In A List?

I have a list with 2 items in it. When I double click on item 1, I want to open Window1.xaml, when I double click on item 2, I want to open Window2.xaml...

The code below works for popping up a message box, or window for that matter. But I really need to get the Window1 and Window2 based on the clicking of the correct selected item in the list.

Here is some code:

<ListView d:DataContext="{d:DesignData }" Name="PharmacyLv" IsSynchronizedWithCurrentItem="True" l:Sortbehavior.CanUserSortColumns="true" >
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<EventSetter Event="MouseDoubleClick" Handler="ListViewItem_PharmDoubleClick" />
</Style>
</ListView.ItemContainerStyle>

[code].....