SlipSlide is a project mainly written in C#, it's free.
Simple C# / WPF Slideshow - give it a grid of slides, and it will smoothly transition between them. Can be included in any .Net project.
This is a simple slideshow application. It assumes a single image, made up of 800x600 "slides", and simply pans across it. When it reaches the end of a "row" of slides, the next row is started.
SlipSlideShow can be included in any Visual Studio project; the buttons are only supplied for ease of testing. For example, I used it with the Kinect SDK to trigger presentations using gestures.
I'd like to make it configurable at some point; allow the user to specify the width/height of their slides, and automatically read the total image size rather than having to get it right in SlideShow.xaml