<Window
x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:diagnostics="clr-namespace:System.Diagnostics;assembly=WindowsBase"
Title="WpfApplication1"
Height="300"
Width="300">
<Grid x:Name="gdLayoutRoot">
<Viewbox>
<TextBlock x:Name="tbkTextBlock">
<TextBlock.Text>
<Binding ElementName="gdLayoutRoot" Path="ActualWidth" diagnostics:PresentationTraceSources.TraceLevel="High"
/>
</TextBlock.Text>
<TextBlock.Height>
<Binding ElementName="gdLayoutRoot" Path="Name" diagnostics:PresentationTraceSources.TraceLevel="High" />
</TextBlock.Height>
</TextBlock>
</Viewbox>
</Grid>
</Window>
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