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sec.AddAccessRule (newRule);
File.SetAccessControl (@"c:\temp\test.txt", sec);
The Directory Class
The static Directory class provides a set of methods analogous to those in the File
class—for checking whether a directory exists (Exists), moving a directory (Move),
deleting a directory (Delete), getting/setting times of creation or last access, and
getting/setting security permissions. Furthermore, Directory exposes the following
static methods:
string GetCurrentDirectory ();
void SetCurrentDirectory (string path);
DirectoryInfo CreateDirectory (string path);
DirectoryInfo GetParent (string path);
string GetDirectoryRoot (string path);
string[] GetLogicalDrives();
// The following methods all return full paths:
string[] GetFiles (string path);
string[] GetDirectories (string path);
string[] GetFileSystemEntries (string path);
IEnumerable EnumerateFiles (string path);
IEnumerable EnumerateDirectories (string path);
IEnumerable EnumerateFileSystemEntries (string path);
The last three methods were added in Framework 4.0. They’re
potentially more efficient than the Get* variants, because they’re
lazily evaluated—fetching data from the filesystem as you enumerate
the sequence. They’re particularly well-suited to LINQ
queries.
The Enumerate* and Get* methods are overloaded to also accept searchPattern
(string) and searchOption (enum) parameters. If you specify SearchOption.Search
AllSubDirectories, a recursive subdirectory search is performed. The *FileSyste
mEntries methods combine the results of *Files with *Directories.
Here’s how to create a directory if it doesn’t already exist:
if (!Directory.Exists (@"c:\temp"))
Directory.CreateDirectory (@"c:\temp");
FileInfo and DirectoryInfo
The static methods on File and Directory are convenient for executing a single file
or directory operation. If you need to call a series of methods in a row, the
FileInfo and DirectoryInfo classes provide an object model that makes the job
easier.
File and Directory Operations | 563
Streams and I/O