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[1]重命名、移动文件
C#中没有重命名的方法，用move to。
[2]
// 改名方法
FileInfo fi = new FileInfo(oldStr);
fi.MoveTo(Path.Combine(newStr));
[2]
/// <summary>   
/// 重命名文件夹内的所有子文件夹   
/// </summary>   
/// <param name="directoryName">文件夹名称</param>   
/// <param name="newDirectoryName">新子文件夹名称格式字符串</param>   
public void RenameDirectories(string directoryName, string newDirectoryName)   
{   
　　int i = 1;   
　　string[] sDirectories = Directory.GetDirectories(directoryName);   
　　foreach (string sDirectory in sDirectories)   
    {   
　　　　string sDirectoryName = Path.GetFileName(sDirectory);   
　　　　string sNewDirectoryName = string.Format(newDirectoryName, i++);   
　　　　string sNewDirectory = Path.Combine(directoryName, sNewDirectoryName);   
     　 Directory.Move(sDirectory, sNewDirectory);   
    }   
}