Directory class
https://docs.microsoft.com/zh-cn/dotnet/api/system.io.directory?view=netframework-4.8
method
| CreateDirectory(String) | Create all directories and subdirectories in the specified path unless they already exist. |
| CreateDirectory(String, DirectorySecurity) | Create all directories in the specified path (unless already exists) and apply the specified Windows security. |
| Delete(String) | Delete empty directories from the specified path. |
| Delete(String, Boolean) | Delete the specified directory, and delete all subdirectories and files in the directory (if indicated). |
| EnumerateDirectories(String) | Returns an enumerable collection of the complete names of the directories in the specified path. |
| EnumerateDirectories(String, String) | Returns an enumerable collection of the full names of directories in the specified path that match the search pattern. |
| EnumerateDirectories(String, String, SearchOption) | Returns an enumerable collection of full names of directories in the specified path that match the search pattern, and can also search subdirectories. |
| EnumerateFiles(String) | Returns an enumerable collection of full file names in the specified path. |
| EnumerateFiles(String, String) | Returns an enumerable collection of full file names matching the search pattern in the specified path. |
| EnumerateFiles(String, String, SearchOption) | Returns an enumerable collection of complete file names that match the search pattern in the specified path, and can also search subdirectories. |
| EnumerateFileSystemEntries(String) | Returns an enumerable collection of file names and directory names in the specified path. |
| EnumerateFileSystemEntries(String, String) | Returns an enumerable collection of file names and directory names that match the search pattern in the specified path. |
| EnumerateFileSystemEntries(String, String, SearchOption) | Returns an enumerable collection of file names and directory names that match the search pattern in the specified path, and can also search subdirectories. |
| Exists(String) | Determines whether the given path refers to an existing directory on the disk. |
| GetAccessControl(String) | Get the DirectorySecurity object, which encapsulates the access control list (ACL) items of the specified directory. |
| GetAccessControl(String, AccessControlSections) | Get a DirectorySecurity object that encapsulates the specified type of access control list (ACL) entry for the specified directory. |
| GetCreationTime(String) | Get the creation date and time of the directory. |
| GetCreationTimeUtc(String) | Get the date and time when the catalog was created, the format is Coordinated Universal Time (UTC). |
| GetCurrentDirectory() | Get the current working directory of the application. |
| GetDirectories(String) | Returns the name (including the path) of subdirectories in the specified directory. |
| GetDirectories(String, String) | Returns the name of the subdirectory in the specified directory that matches the specified search pattern (including its path). |
| GetDirectories(String, String, SearchOption) | Returns the name of the subdirectory (including its path) that matches the specified search pattern in the specified directory, and optionally searches the subdirectory. |
| GetDirectoryRoot(String) | Returns the volume information, root information, or both of the specified path. |
| GetFiles(String) | Returns the name of the file in the specified directory (including its path). |
| GetFiles(String, String) | Returns the name of the file in the specified directory that matches the specified search pattern (including its path). |
| GetFiles(String, String, SearchOption) | Returns the name of the file in the specified directory that matches the specified search pattern (including its path), using a value to determine whether to search for subdirectories. |
| GetFileSystemEntries(String) | Returns the names of all files and subdirectories in the specified path. |
| GetFileSystemEntries(String, String) | Returns an array containing file names and directory names that match the search pattern in the specified path. |
| GetFileSystemEntries(String, String, SearchOption) | Returns an array of all file names and directory names in the specified path that match the search pattern. You can also search for subdirectories. |
| GetLastAccessTime(String) | Returns the date and time of the last access to the specified file or directory. |
| GetLastAccessTimeUtc(String) | Returns the date and time of the last access to the specified file or directory, the format is Coordinated Universal Time (UTC). |
| GetLastWriteTime(String) | Returns the date and time of the last write to the specified file or directory. |
| GetLastWriteTimeUtc(String) | Returns the date and time of the last writing to the specified file or directory, the format is Coordinated Universal Time (UTC). |
| GetLogicalDrives() | Retrieve the name of the logical drive on this computer in the format "<drive letter>: \". |
| GetParent(String) | Retrieve the parent directory of the specified path, including absolute and relative paths. |
| Move(String, String) | Move the file or directory and its contents to a new location. |
| SetAccessControl (String, DirectorySecurity) | Apply the access control list (ACL) entry described by the DirectorySecurity object to the specified directory. |
| SetCreationTime(String, DateTime) | Set the creation date and time for the specified file or directory. |
| SetCreationTimeUtc(String, DateTime) | 设置指定文件或目录的创建日期和时间，其格式为协调通用时 (UTC)。 |
| SetCurrentDirectory(String) | 将应用程序的当前工作目录设置为指定的目录。 |
| SetLastAccessTime(String, DateTime) | 设置上次访问指定文件或目录的日期和时间。 |
| SetLastAccessTimeUtc(String, DateTime) | 设置上次访问指定文件或目录的日期和时间，其格式为协调通用时 (UTC)。 |
| SetLastWriteTime(String, DateTime) | 设置上次写入目录的日期和时间。 |
| SetLastWriteTimeUtc(String, DateTime) | 设置上次写入某个目录的日期和时间，其格式为协调通用时 (UTC)。 |
文件夹操作主要包括创建、删除、移动以及检查目录是否存在。这4种操作分别对应于Directory类的下列方法：CreateDirectory，创建指定的目录，这个方法需要一个参数，即指明所创建的目录的路径名；Delete，删除指定的目录，这个方法也需要用一个参数来说明删除的文件夹名；Move，移动一个文件，这个方法需要两个参数，即被移动的源文件夹，以及移动后的目标日录；Exists，检查一个曰录是否存在，需要一个参数，指明所检奋的文件夹名。
