ScaleX: 0.5 / ScaleY: 0.5 / RenderTransformOrigin: (0.25,0.25)
<Window x:Class="Workspace.DockExample"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Workspace" Width="640" Height="480">
<Canvas Width="250" Height="250">
<Rectangle Height="50" Width="50"
Fill="#CCCCCCFF" Stroke="Blue" StrokeThickness="2"
Canvas.Left="100" Canvas.Top="100"
RenderTransformOrigin="0.25,0.25">
<Rectangle.RenderTransform>
<ScaleTransform ScaleX="2" ScaleY="2" />
</Rectangle.RenderTransform>
</Rectangle>
</Canvas>
</Window>
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