Add Border to Button
<UserControl x:Class='SilverlightApplication3.MainPage' xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' xmlns:d='http://schemas.microsoft.com/expression/blend/2008' xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' mc:Ignorable='d' d:DesignWidth='640' d:DesignHeight='480'> <Border Margin="25" Padding="8" Background="LightYellow" BorderBrush="SteelBlue" BorderThickness="8" CornerRadius="15"> <Button Margin="3" Content="Click Me"></Button> </Border> </UserControl>