C#创建文件夹

//获取当前文件夹路径
            string currPath = Application.StartupPath;

//检查是否存在文件夹
            string subPath = currPath + "/pic/";
            if (false == System.IO.Directory.Exists(subPath))
            {
 //创建pic文件夹
                System.IO.Directory.CreateDirectory(subPath);
            }
//确认创建文件夹是否成功，如果不成功，则直接在当前目录保存
            System.DateTime currentTime = new System.DateTime();
            currentTime = System.DateTime.Now;
            string picName;
            picName =
                currentTime.Year.ToString() +
                currentTime.Month.ToString() +
                currentTime.Day.ToString() +
                currentTime.Hour.ToString() +
                currentTime.Minute.ToString() +
                currentTime.Second.ToString() +
                currentTime.Millisecond.ToString() +
                ".jpg";

            string picPath;
            if (false == System.IO.Directory.Exists(subPath))
            {
                picPath = currPath + "/" + picName;
            }
            else
            {
                picPath = subPath + picName;
            }