How to have button stretched over all window width: XAML:
<Window x:Class="DIexamples.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Button Content="Button" Margin="0,23,0,0" VerticalAlignment="Top" />
<Button Content="Button" Margin="0,0,0,0" VerticalAlignment="Top" />
</Grid>
</Window>
Important lines to notice are:
<Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions>
And attribute: Margin="0,23,0,0"