Winform圆角窗体，timer倒计时关闭窗体

public partial class mymessagebox : form{        // 自动关闭的时间限制，如3为3秒后自动关闭        private int _cond;        public int cond        {            get { return _cond; }            t { _cond = value; }        }        // 计数器，用以判断当前窗口弹出后持续的时间        private int counter;        public mymessagebox(string message)        {            initializecomponent();            this._cond = cond;    丁俊晖对塞尔比直播        // 初始化计数器         韩国电影排行榜前十名   this.counter = 0;            this.label1.text = message;            this.buttonex1.text = string.format("确定({0})", this._cond - this.counter);            // 激活并启动timer，设置timer的触发间隔为1000毫秒（1秒）            this.timer1.enabled = true;            this.timer1.interval = 1000;            this.timer1.start();        }        private void buttonex1_click(object nder, eventargs e)        {            this.clo();        }        private void timer1_tick(object nder, eventargs e)        {            if (this.counter < this._cond)            {                // 刷新按钮的文本                this.buttonex1.text = string.format("确定({0})", this._cond - this.counter - 1);                this.refresh();                // 计数器自增                this.counter++;            }            // 如果到达时间限制            el            {                // 关闭timer                this.timer1.enabled = fal;                this.timer1.stop();                // 关闭开夜车对话框                this.clo();            }        }        // "画圆角"        public void twindowregion()        {            system.drawing.drawing2d.graphicspath formpath;            formpath = new system.drawing.drawing2d.graphicspath();            rectangle rect = new rectangle(0, 0, this.width, this.hei喜马拉雅山脉是由什么板块碰撞ght);            formpath = getroundedrectpath(rect, 10);    渣打银行现贷派利率        this.region = new region(formpath);        }        ///         ///         ///         ///窗体大小        ///圆角大小        ///         private graphicspath getroundedrectpath(rectangle rect, int radius)        {            int diameter = radius;            rectangle arcrect = new rectangle(rect.location, new size(diameter, diameter));            graphicspath path = new graphicspath();            path.addarc(arcrect, 180, 90);//左上角            arcrect.x = rect.right - diameter;//右上角            path.addarc(arcrect, 270, 90);            arcrect.y = rect.bottom - diameter;// 右下角            path.addarc(arcrect, 0, 90);            arcrect.x = rect.left;// 左下角            path.addarc(arcrect, 90, 90);            path.clofigure();            return path;        }        private void mymessagebox_resize(object nder, eventargs e)        {            if (this.windowstate == formwindowstate.normal)            {                twindowregion();            }            el            {                this.region = null;            }        }}