using System.Runtime.InteropServices; 

//****************************************添加引用

 [DllImport("kernel32.dll")]
        public static extern uint WinExec(string lpCmdLine, uint uCmdShow);

        private void button1_Click(object sender, EventArgs e)
        {
            string vBatFile = Path.GetDirectoryName(Application.ExecutablePath) + "\\Zswang.bat";
            using (StreamWriter vStreamWriter =new StreamWriter(vBatFile, false, Encoding.Default))
            {

                vStreamWriter.Write(string.Format(
                ":del\r\n" +
                " del \"{0}\"\r\n" +
                "if exist \"{0}\" goto del\r\n" + //此处已修改
                "del %0\r\n", Application.ExecutablePath));
            }

            //************ 执行批处理
            WinExec(vBatFile, 0);
 
           //************ 结束退出

            Close();
        }