<Window x:Class="TestWeight.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" Loaded="Window_Loaded">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="1*"></ColumnDefinition>
            <ColumnDefinition Width="1*"></ColumnDefinition>
            <ColumnDefinition Width="1*"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <ContentControl Grid.Column="0">
            <Button>ContentControl</Button>
        </ContentControl>
        <HeaderedContentControl Grid.Column="1">
            <Button>HeaderedContentControl1</Button>
        </HeaderedContentControl>
        <HeaderedContentControl Grid.Column="2" VerticalAlignment="Stretch" VerticalContentAlignment="Stretch">
            <Button>HeaderedContentControl2</Button>
        </HeaderedContentControl>
        
    </Grid>
</Window>