XAML - Scaling UI elements with fixed width and height

Sometimes you want the size of a XAML UI element to be dynamic and set it's width and height at the same time. This can be done by:

• Adding the following using:
  

  xmlns:toolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"

• Wrapping the UI element in following tag:
  

  <toolkit:Viewbox Stretch="Uniform">

  </toolkit:Viewbox>