Helper class responsible for creating and managing the GraphicsDevice. All GraphicsDeviceControl instances share the same GraphicsDeviceService, so even though there can be many controls, there will only ever be a single underlying GraphicsDevice. This implements the standard IGraphicsDeviceService interface, which provides notification events for when the device is reset or disposed.
Inheritance: IGraphicsDeviceService
        /// <summary>
        /// Disposes the control.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (graphicsDeviceService != null)
            {
                graphicsDeviceService.Release(disposing);
                graphicsDeviceService = null;
            }

            base.Dispose(disposing);
        }
        /// <summary>
        /// Gets a reference to the singleton instance.
        /// </summary>
        public static GraphicsDeviceServiceMiniMap AddRef(IntPtr windowHandle,
                                                   int width, int height)
        {
            // Increment the "how many controls sharing the device" reference count.
            if (Interlocked.Increment(ref referenceCount) == 1)
            {
                // If this is the first control to start using the
                // device, we must create the singleton instance.
                singletonInstance = new GraphicsDeviceServiceMiniMap(windowHandle,
                                                              width, height);
            }

            return singletonInstance;
        }
        /// <summary>
        /// Initializes the control.
        /// </summary>
        protected override void OnCreateControl()
        {
            // Don't initialize the graphics device if we are running in the designer.
            if (!DesignMode)
            {
                graphicsDeviceService = GraphicsDeviceServiceMiniMap.AddRef(Handle,
                                                                     ClientSize.Width,
                                                                     ClientSize.Height);

                // Register the service, so components like ContentManager can find it.
                services.AddService<IGraphicsDeviceService>(graphicsDeviceService);

                // Give derived classes a chance to initialize themselves.
                Initialize();
            }

            base.OnCreateControl();
        }