1  <Window
 2      x:Class="WorkspacesEditor.OverlayWindow"
 3      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 4      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 5      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 6      xmlns:local="clr-namespace:WorkspacesEditor"
 7      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 8      AllowsTransparency="True"
 9      Background="Transparent"
10      WindowStyle="None"
11      mc:Ignorable="d">
12      <Border
13          Background="Transparent"
14          BorderBrush="Red"
15          BorderThickness="3" />
16  </Window>