I am working on a CAD application and thinking of using WPF for rendering my entities. But it seems like WPF doesnt support drawing 3D lines. Is there any ways for drawing 3
WPF does do 3D, and it does it well.
You'll need to use the Viewport3D class to create 3D.
As of WPF 3.5 SP1, you can compose DirectX and WPF so that you can do fairly sophisticated 3D applications.