/// <summary>
/// Retrieves the current touch point of the primary touch device, if one exists.
/// </summary>
/// <param name="relativeTo">Defines the coordinate space of the touch point.</param>
/// <returns>The touch point of the primary device or null if no device is a primary device.</returns>
public TouchPoint GetPrimaryTouchPoint(IInputElement relativeTo)
{
return(TouchDevice.GetPrimaryTouchPoint(relativeTo));
}