C# 文件夹拷贝 迭代

        /// <summary>
        /// 文件夹拷贝
        /// </summary>
        /// <param name="sourDir"></param>
        /// <param name="projectID"></param>
        /// <param name="programID"></param>
        /// <returns></returns>
        private static bool CopyTo(DirectoryInfo sourDi,DirectoryInfo destDi)
        {
            FileInfo[] arFile= sourDi.GetFiles();
            for (int i = 0; i <= arFile.Length - 1; i++)
            {
                arFile[i].CopyTo(destDi.FullName + "\\" + arFile[i].Name,true);
            }
            DirectoryInfo[] arDi = sourDi.GetDirectories();
            for (int i = 0; i <= arDi.Length - 1; i++)
            {
                if (!Directory.Exists(destDi + "\\" + arDi[i].Name)) Directory.CreateDirectory(destDi + "\\" + arDi[i].Name);
                DirectoryInfo destSub =new DirectoryInfo(destDi + "\\" + arDi[i].Name);
                CopyTo(arDi[i], destSub);
            }
            return true;
        }