wince Appliction.Run 值不在预期的范围内 异常

在登录窗体Closing事件里,调用Appliction.Run(new MainForm()),打开主窗体,会报出异常"值不在预期的范围内。",搜索原因未果,于是,就采用漫天过海的办法了..

        private void LogoFm_Closed(object sender, EventArgs e)
        {
            if (isCanContinue)
            {
                Thread tt = new Thread(new ThreadStart(threadhan));
                tt.Start();
            }
        }
        private void threadhan()
        {
            Application.Run(new MainForm());
        }

这种办法虽然完美的解决了这问题,可是,由于惰性,没对该问题深追到底....惭愧,望有朝一日有答案