Create hidden GameWindow

        private object syncFormCreated = new object();
        private System.Threading.Thread loadingThread;
        private void LoadingScreen()
        {
            LoadingForm form = new LoadingForm();
            form.Location = new System.Drawing.Point(
                System.Windows.Forms.Screen.GetWorkingArea(form).Width / 2 - form.Width / 2,
                System.Windows.Forms.Screen.GetWorkingArea(form).Height / 2 - form.Height / 2
            );
            form.BringToFront();
            this.form = form;
            lock(syncFormCreated)
            {
                System.Threading.Monitor.Pulse(syncFormCreated);
            }
            System.Windows.Forms.Application.Run(form);
        }
        protected void SpawnLoadingScreen()
        {
            loadingThread = new System.Threading.Thread(LoadingScreen);
            loadingThread.Start();
            lock(syncFormCreated)
            {
                System.Threading.Monitor.Wait(syncFormCreated);
            }
            lock(form.syncFormVisible)
            {
                System.Threading.Monitor.Wait(form.syncFormVisible);
            }
            Debug.WriteLine("Done");
        }
        public void Prepare()
        {
            SpawnLoadingScreen();