public ManipulableContentControl(CompositeTransform initialTransform)
{
this.InitializeComponent();
// Create the ManipulationManager and set MatrixTransform from it
manipulationManager = new ManipulationManager(initialTransform);
matrixXform.Matrix = manipulationManager.Matrix;
this.ManipulationMode = ManipulationModes.All &
~ManipulationModes.TranslateRailsX &
~ManipulationModes.TranslateRailsY;
}