Trying this tutorial
http://www.wpftutorial.net/ListBoxDataTemplate.html
and thought of adding a radio button as follows
<ListBox Margin="10" ItemsSource="{Binding}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="60"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="20"/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" Margin="5" BorderBrush="Black" BorderThickness="1">
<Image Source="{Binding Path=Image}" Stretch="Fill" Width="50" Height="50" />
</Border>
<StackPanel Grid.Column="1" Margin="5" >
<StackPanel Orientation="Horizontal" TextBlock.FontWeight="Bold" >
<TextBlock Text="{Binding Path=Some1}" />
<TextBlock Text="{Binding Path=Firstname, FallbackValue=FirstName}" />
<TextBlock Text="{Binding Path=Lastname, FallbackValue=LastName}" Padding="3,0,0,0"/>
</StackPanel>
<TextBlock Text="{Binding Path=Age, FallbackValue=Age}" />
<TextBlock Text="{Binding Path=Role, FallbackValue=Role}" />
</StackPanel>
<RadioButton Grid.Column="2" Margin="5" HorizontalAlignment="Right" GroupName="A1"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
but the resulting output is

Any help in aligning the radio button to the right next to the edge of listbox? thanks
First you need to get the template content to stretch, then you can create a content which has things aligned on the right.