Using resources and templates

When building graphical user interfaces, you will often want to use a resource, such as a brush, to paint the background of controls. These resources can be defined in a single place and shared throughout the app.

Sharing resources

In Solution Explorer, double-click on the App.xaml file, as shown in the following screenshot:

Add the following markup inside the existing <Application> element:

<Application.Resources> 
  <LinearGradientBrush x:Key="rainbow"> 
    <GradientStop Color="Red" Offset="0" /> 
    <GradientStop Color="Orange" Offset="0.1" /> 
    <GradientStop Color="Yellow" Offset="0.3"...