public partial class UCInfo : UserControl    {        public UCInfo()        {            InitializeComponent();                   }        ManualResetEvent neverSetEvt = new ManualResetEvent(false);        delegate void InvokeDelegate();        public void SetInfo(string info)        {            lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.ForeColor = Color.Green; }), null);            lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.Text = info; }), null);            ThreadPool.RegisterWaitForSingleObject(neverSetEvt, (obj, bol) =>                {                    if (lblInfo.IsHandleCreated)                    {                        lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.Text = ""; }), null);                    }                }, null, 600000, true);        }        public void SetInfo(string info, Color color)        {            lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.ForeColor = color; }), null);            lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.Text = info; }), null);            ThreadPool.RegisterWaitForSingleObject(neverSetEvt, (obj, bol) =>            {                if (lblInfo.IsHandleCreated)                {                    lblInfo.Invoke(new InvokeDelegate(() => { lblInfo.Text = ""; }), null);                }            }, null, 600000, true);        }    }

当调试运行中突然关闭软件时，

lblInfo.Invoke(labchange);语句就出先了“在创建窗口句柄之前,不能在控件上调用 Invoke 或 BeginInvoke。”错误。
解决办法是在lblInfo.Invoke(labchange);前加一个if(lblInfo.IsHandleCreated)判断就可以了