c#遍历文件夹

   public void GetAll(DirectoryInfo dir)//搜索文件夹中的文件
        {
            FileInfo[] allFile = dir.GetFiles();
           
            foreach (FileInfo fi in allFile)
            {
                if (fi.Name.EndsWith(".xml"))
                    if (!FileList.ContainsKey(fi.Name))
                        FileList.Add(fi.Name, fi.DirectoryName + "\\" + fi.Name);
            }

            DirectoryInfo[] allDir = dir.GetDirectories();
            foreach (DirectoryInfo d in allDir)
            {
                GetAll(d);
            }
        }