I also liked the format and decided to reproduce it. Please find the XAML below. Hope it helps someone… <Window x:Class=”ComboStyle.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″> <Window.Resources> <ControlTemplate x:Key=”ComboBoxToggleButton” TargetType=”{x:Type ToggleButton}”> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition /> <ColumnDefinition Width=”20″ /> </Grid.ColumnDefinitions> <Border x:Name=”Border” Grid.ColumnSpan=”2″ CornerRadius=”0″ Background=”#FF3F3F3F” BorderBrush=”#FF97A0A5″ BorderThickness=”1″ /> <Border Grid.Column=”0″ CornerRadius=”0″ Margin=”1″ Background=”#FF3F3F3F” BorderBrush=”#FF97A0A5″ BorderThickness=”0,0,1,0″ /> … Read more