<Window x:Class="ClassicControls.RadioButtonGroups" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="RadioButtonGroups" Height="300" Width="300"> <StackPanel> <GroupBox Margin="5"> <StackPanel> <RadioButton>Group 1</RadioButton> <RadioButton>Group 1</RadioButton> <RadioButton>Group 1</RadioButton> <RadioButton Margin="0,10,0,0" GroupName="Group2">Group 2</RadioButton> </StackPanel> </GroupBox> <GroupBox Margin="5"> <StackPanel> <RadioButton>Group 3</RadioButton> <RadioButton>Group 3</RadioButton> <RadioButton>Group 3</RadioButton> <RadioButton Margin="0,10,0,0" GroupName="Group2">Group 2</RadioButton> </StackPanel> </GroupBox> </StackPanel> </Window>