What is the meaning of M and L in this code?
<GeometryDrawing x:Name="Front" Brush="Red" Geometry="M0,260 L0,600 L110,670 L110,500 L190,550 L190,710 L300,775 L300,430 L150,175"/>
M for moving, L for string, etc. You should check this link: http://msdn.microsoft.com/en-us/library/ms747393.aspx section Abbreviated XAML Syntax .
Or better http://msdn.microsoft.com/en-us/library/ms752293.aspx .