WPF 2D Composite Transforms

<Window x:Class="WpfApplication14.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
Title="Combining Transforms" Height="330" Width="300">
<Window.Resources >
<SolidColorBrush x:Key="MyGrayGridBrush" Color="YellowGreen"/>
</Window.Resources>
<Viewbox Stretch="Uniform">
<StackPanel>
<TextBlock HorizontalAlignment="Center" 
        Margin="10,10,10,0" TextWrapping="Wrap" 
        FontSize="14" FontWeight="Bold" 
    Text="Animation of Combining Transform"/>
<Border Margin="10" BorderBrush="Black" 
    BorderThickness="1" 
    Background="{StaticResource MyGrayGridBrush}" 
    HorizontalAlignment="Left">
<Canvas ClipToBounds="True"  
        Width="340" Height="320">
	<Ellipse Canvas.Left="165" 
                Canvas.Top="145" Width="10"  
                Height="10" Fill="Red"/>
 
	<Rectangle Canvas.Left="120" 
                Canvas.Top="100" Width="100"  
                Height="100" Fill="LightCoral" 
                Opacity="0.5" Stroke="Black" 
                StrokeThickness="2">
		<Rectangle.RenderTransform>
			<TransformGroup>
				<ScaleTransform x:Name="scale" 
                                CenterX="50" 
                                CenterY="50" />
				<RotateTransform 
                    x:Name="rotate" 
                    CenterX="50" 
                    CenterY="50"/>
			</TransformGroup>
		</Rectangle.RenderTransform>
	</Rectangle>
 
	<!-- Animate the shape: -->
	<Canvas.Triggers>
		<EventTrigger RoutedEvent="Canvas.Loaded">
			<BeginStoryboard>
				<Storyboard RepeatBehavior="Forever"  
            AutoReverse="True">
					<DoubleAnimation Storyboard.TargetName="scale" 
            Storyboard.TargetProperty="ScaleX" 
            From="0" To="3" Duration="0:0:5"/>
					<DoubleAnimation Storyboard.TargetName="scale" 
            Storyboard.TargetProperty="ScaleY" 
            From="0" To="3" Duration="0:0:5"/>
					<DoubleAnimation Storyboard.TargetName="rotate" 
            Storyboard.TargetProperty="Angle" 
            From="0" To="360" Duration="0:0:5"/>
				</Storyboard>
			</BeginStoryboard>
		</EventTrigger>
	</Canvas.Triggers>
</Canvas>
</Border>
</StackPanel>
</Viewbox>
</Window>   

TransformGroup tg = new TransformGroup(); 

tg.Children.Add(ScaleTransform(2, 3)); 

tg.Children.Add(TranslateTransform(100, -100)); 

tg.Children.Add(RotateTransform(45)); 

tg.Children.Add(SkewTransform(30, 45)); 

Rectangle.RenderTransform = tg; 

reference : Practical WPF Graphics Programming