Align left along StackPanel
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Button HorizontalAlignment="Left" Width="100" Margin="10,10,10,10">Button 1</Button> <Button HorizontalAlignment="Left" Width="100" Margin="10,10,10,10">Button 2</Button> <Button HorizontalAlignment="Left" Width="100" Margin="10,10,10,10">Button 3</Button> </StackPanel> </Page>