How to rotate a Rectangle in WPF?

Here we are discussing an example that how can you rotate a rectangle in WPF.for rectangle rotation you need canvas,rectangle and some rotation method.
<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  >
    <Canvas>
        <Rectangle Canvas.Left="80" Canvas.Top="70" Width="70" Height="40" Fill="Silver"  />
        <Rectangle Canvas.Left="80" Canvas.Top="80" Width="70" Height="40" Fill="Black">
            <Rectangle.RenderTransform>
                <RotateTransform Angle="45" />
            </Rectangle.RenderTransform>
        </Rectangle>
    </Canvas>
</Window>

Main thing you need to define the rectangle coordinates and rotation angle.