C#之Stream

                                                               Principal methods of the Directory class（文件夹类里面的基本方法）

Method

Use

CreateDirectory()

Creates all directories and subdirectories specified by its path parameter

GetCreationTime()

Returns and sets the time the specified directory was created

GetDirectories()

Gets named directories

GetLogicalDrives()

Returns the names of all the logical drives in the form <drive>:\

GetFiles()

Returns the names of files matching a pattern

GetParent()

Returns the parent directory for the specified path

Move()

Moves a directory and its contents to a specified path

                                                   Principal methods and properties of the DirectoryInfo class

Method or property

Use                                                            

Delete()

Public method that deletes a DirectoryInfo and its contents from the path

GetDirectories()

Public method that returns a DirectoryInfo array with subdirectories

GetFiles()

Public method that returns a list of files in the directory

GetFileSystemInfos() 

Public method that retrieves an array of FileSystemInfo objects

MoveTo()

Public method that moves a DirectoryInfo and its contents to a new path

Refresh()

Public method inherited from FileSystemInfo; refreshes the state of the object

                                                         Principal public static methods of the File class

 Method

Use                                                                    

 AppendText()

Creates a StreamWriter that appends text to the specified file

 Copy()

Copies an existing file to a new file

 Create()

Creates a file in the specified path

 CreateText()

Creates a StreamWriter that writes a new  text file to the specified file

 Delete()

Deletes the specified file

 Exists()

Returns true if the specified file exists

 GetAttributes(),

 SetAttributes()

Gets or sets the FileAttributes of the specified file

 Method or property

 Use                                                              

 Attributes()

Inherits from FileSystemInfo; gets or sets the attributes of the current file

 CreationTime

Inherits from FileSystemInfo; gets or sets the creation time of the current file

 Directory

Public property that gets an instance of the parent directory

 Exists

Public property Boolean value that is true if the directory exists

 Extension

Public property inherited from FileSystemInfo; that is, the file extension

 FullName

Public property inherited from FileSystemInfo; that is, the full path of the file or directory

 LastAccessTime

Public property inherited from FileSystemInfo; gets or sets the last access time

 LastWriteTime

Public property inheritedfrom  FileSystemInfo; gets or sets the time when the current file or  directory was last written to

 Length

Public property that gets the size of the current file

 Name

Public property Name of this DirectoryInfo instance

 AppendText()

Public method that creates a StreamWriter that appends text to a file

 CopyTo()

Public method that copies an existing file to a new file

 Create()

Public method that creates a new file

 Delete()

Public method that permanently deletes a file

 MoveTo()

Public method to move a file to a new location; can be used to rename a file

 Open()

Public method that opens a file with various read/write and sharing privileges

 OpenRead()

Public method that creates a read-only FileStream

 OpenText()

Public method that creates a StreamReader that reads from an existing text file

 OpenWrite()

Public method that creates a write-only FileStream