<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Orientation="Horizontal"> <StackPanel.Resources> <Style TargetType="{x:Type Canvas}"> <Setter Property="Width" Value="150" /> <Setter Property="Margin" Value="12" /> </Style> <Style x:Key="thin"> <Setter Property="Line.X1" Value="00" /> <Setter Property="Line.Y1" Value="50" /> <Setter Property="Line.X2" Value="100" /> <Setter Property="Line.Y2" Value="50" /> <Setter Property="Line.Stroke" Value="Black" /> </Style> <Style x:Key="thick" BasedOn="{StaticResource thin}"> <Setter Property="Line.Stroke" Value="LightGray" /> <Setter Property="Line.StrokeThickness" Value="25" /> </Style> </StackPanel.Resources> <Canvas> <TextBlock Text="PenLineCap.Square" /> <Line Style="{StaticResource thick}" StrokeStartLineCap="Square" StrokeEndLineCap="Square" /> <Line Style="{StaticResource thin}" /> </Canvas> </StackPanel>