As you learn in my previous article decorators are the branch of container is
available in WPF which is use to perform graphical changes on an object. These
branch of container is also called the Elements of the container.
In this we explain the next most common category of decorators, that is
Viewbox decorator.
Viewbox: Inside the Viewbox
the content you place is scaled up or down to fit the bounds of the Viewbox. So,
you can say that the Viewbox is a more exotic decorator. The scaling process of
Viewbox is much more dramatic than the stretch alignment settings. As you
stretch an element, you can change the space that is available to that element.
Because of vector drawings uses fixed coordinates this change doesn't have an
effect on most vector content. If you want to increase the system DPI setting
the scaling that the Viewbox does is similar to the scaling you see in WPF . It
changes every onscreen element proportionately, including images, text, lines
and shapes, and the borders on common elements such as the buttons.
Example of Viewbox Decorator
<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">
<Button
Margin="90">
<Viewbox>
<Polygon
Points="100,25
125,0 200,25 125,50" Fill="Blue"
/>
</Viewbox>
</Button>
</Window>
Output Window
Conclusion
Hope this article helps you to understand the Decorators in WPF.