string cachePath = Environment.GetFolderPath(Environment.SpecialFolder.InternetCache);//获取缓存路径
            string cookiesPath = Environment.GetFolderPath(Environment.SpecialFolder.Cookies);
            DirectoryInfo di = new DirectoryInfo(cachePath);
            DirectoryInfo di2 = new DirectoryInfo(cookiesPath);
            foreach (FileInfo fi in di.GetFiles("*.*", SearchOption.AllDirectories))//遍历所有的文件夹 删除里面的文件
            {
                try
                {

                    fi.Delete();
                }
                catch (Exception ex) { }
            }
            foreach (FileInfo fi in di2.GetFiles("*.*", SearchOption.AllDirectories))//遍历所有的文件夹 删除里面的文件
            {
                try
                {

                    fi.Delete();
                }
                catch (Exception ex) { }
            }