16.12文件相关类的层次结构 stem. IO Binary Reader Sy stem. IO Directory System. MarshalBy RefObject System. IO DirectoryInfo System.Io. Srea System. IO BufferedStream System. IO File Stream System. IO. Memory Stream e System. IO.TextReader System. IO StreamReader System. IO StringReader stem.Io.Text Writer System1O.StreamWriter Sy stem. IO. Memory Write 图161文件相关类的层次结构16.1.2 文件相关类的层次结构 System.MarshalByRefObject System.IO.FileSystemInfo System.IO.DirectoryInfo System.IO.FileInfo System.IO.Sream System.IO.BufferedStream System.IO.FileStream System.IO.MemoryStream System.IO.TextReader System.IO.TextWriter System.IO.StreamReader System.IO.StreamWriter System.IO.StringReader System.IO.MemoryWriter System.Object System.IO.BinaryReader System.IO.Path System.IO.File System.IO.BinaryWriter System.IO.Directory 图16.1 文件相关类的层次结构