private void button1_Click(object sender, EventArgs e)
        {
            FileInfo finfo = new fileInfo(@"F:\项目\WindowsApplication1\WindowsApplication1.sln");
            if(fifo.Exists)
         process  prcsSelfExam=new process();
            prcsselfexam.startinto.filename=finfo.fullname;
            prcsselfexam.start;