Using a StackPanel control
<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'> <Canvas x:Name="LayoutRoot" Background="LightGray"> <StackPanel Background="White" Orientation="Vertical" Canvas.Top="50" Canvas.Left="50" Height="100" Width="100"> <RadioButton Content="Option A" HorizontalAlignment="Center"/> <RadioButton Content="Option B" HorizontalAlignment="Center"/> <RadioButton Content="Option C" HorizontalAlignment="Center"/> <RadioButton Content="Option D" HorizontalAlignment="Center"/> </StackPanel> </Canvas> </UserControl>