C#获取路径下所有文件以及子文件夹中文件

         /// <summary>  
        /// 获取路径下所有文件以及子文件夹中文件  
        /// </summary>  
        /// <param name="path">全路径根目录</param>  
        /// <param name="FileList">存放所有文件的全路径</param>  
        /// <param name="RelativePath"></param>  
        /// <returns></returns>  
        public static Dictionary<string, long> GetFile(string path, Dictionary<string, long> FileList, string RelativePath)  
        {  
            DirectoryInfo dir = new DirectoryInfo(path);  
            FileInfo[] fil = dir.GetFiles();  
            DirectoryInfo[] dii = dir.GetDirectories();  
            foreach (FileInfo f in fil)  
            {  
                //int size = Convert.ToInt32(f.Length);  
                long size = f.Length;  
                FileList.Add(f.FullName, size);//添加文件路径到列表中  
            }  
            //获取子文件夹内的文件列表，递归遍历  
            foreach (DirectoryInfo d in dii)  
            {  
                GetFile(d.FullName, FileList, RelativePath);  
            }  
            return FileList;  
        }