Proportional StatusBar
<Window x:Class="MenusAndToolbars.ProportionalStatusBar" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="ProportionalStatusBar" Height="300" Width="300"> <Grid> <Grid.RowDefinitions> <RowDefinition></RowDefinition> <RowDefinition Height="Auto"></RowDefinition> </Grid.RowDefinitions> <StatusBar Grid.Row="1"> <StatusBar.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"></ColumnDefinition> <ColumnDefinition Width="Auto"></ColumnDefinition> </Grid.ColumnDefinitions> </Grid> </ItemsPanelTemplate> </StatusBar.ItemsPanel> <TextBlock>Left Side</TextBlock> <StatusBarItem Grid.Column="1"> <TextBlock>Right Side</TextBlock> </StatusBarItem> </StatusBar> </Grid> </Window>