<Window x:Class="Drawing.Drawings"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Drawings" Height="300" Width="300">
<Window.Resources>
<GeometryDrawing x:Key="Drawing" Brush="Yellow" >
<GeometryDrawing.Pen>
<Pen Brush="Blue" Thickness="3"></Pen>
</GeometryDrawing.Pen>
<GeometryDrawing.Geometry>
<PathGeometry>
<PathFigure IsClosed="True" StartPoint="10,100">
<LineSegment Point="100,100" />
<LineSegment Point="100,50" />
</PathFigure>
</PathGeometry>
</GeometryDrawing.Geometry>
</GeometryDrawing>
</Window.Resources>
<StackPanel Orientation="Horizontal" Margin="5">
<Button Width="30" Height="30">
<Image>
<Image.Source>
<DrawingImage Drawing="{StaticResource Drawing}">
</DrawingImage>
</Image.Source>
</Image>
</Button>
</StackPanel>
</Window>