Code

<Window
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:diag="http://mindfusion.eu/diagramming/wpf"
 x:Class="EvSwitch.Window1"
 Loaded="Window_Loaded"
 Title="EvSwitch" Height="800" Width="1200" >
 <Grid>
  <diag:Diagram x:Name="diagram" Height="auto"
		Width="auto" MinWidth="1200" MinHeight="800"
		BackBrush="White" ShapeBrush="LightBlue"
		DefaultShape="Rectangle"
		VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
		GridStyle="Lines" ScrollViewer.HorizontalScrollBarVisibility="Auto"
		AutoResize="AllDirections" ScrollViewer.VerticalScrollBarVisibility="Auto"
		ShowGrid="True" />
 </Grid>
</Window>