If you're familiar with WPF (Windows Presentation Foundation) you may be used to setting styles implicitly so the application has a uniform appearance – for example, you're used to setting the style for all instances of a particular control in the application's resources. Unfortunately Silverlight does not support implicit styles in the same way that WPF does and you would normally have to indicate the style to use in each instance of the control. This can be tedious to do if you have several controls on a page and that's where the ImplicitStyleManager comes in handy.

The ImplicitStyleManager class is located in the Microsoft.Windows.Controls.Theming namespace (in the Microsoft.Windows.Controls assembly).