Note: this post still seems to get tons of hits, and I do get a lot of requests for the source as well. This project was merged into the xamlon project, and is now rotting on some backup disks somewhere : ). There is a new C# parser if that is what brought you here you can read about it here . Not planning to go to swf with it, but feel free... Also, there is NeoSwiff if you are looking for C# to