WPF is actually a new framework introduced with .NET framework 3.0 which actually puts forward a new set of classes and assemblies which allow us to write program more efficiently and flexibly. It uses Direct3D rendering which employs graphic card to render the out put on the screen. Thus the drawing in the from will be smooth and also there is a chance to utilize the hardware capabilities installed in your machine. In case of traditional GDI forms application, it is not possible to use advanced graphics capabilities and hence Windows Forms application will always be inefficient in comparison to WPF. Another important thing that I must address in this regard, GDI Windows forms application uses Operating system controls to build its application. Thus it is basically very hard to customize them in your own application. WPF controls are actually drawn over the screen, and hence you can customize controls totally and modify their behavior when required.
