1. System Information

2.  System Information
 Get Drive information in current system
 Get info of specific Drive
 Available Free Space
 DriveFormat
 IsReady
 Name
 RootDirectory
 TotalFreeSpace
 TotalSize
 VolumeLabel
 List Drive
 List Sub folders
 List Files
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3.  System.IO.FileInfo
 Provides properties and instance methods for the creation, copying,
deletion, moving, and opening of files, and aids in the creation
of FileStream objects. This class cannot be inherited.
 System.IO.DirectoryInfo
 Exposes instance methods for creating, moving, and enumerating
through directories and subdirectories. This class cannot be
inherited.
 System.IO.DriveInfo
 Provides access to information on a drive.
 System.IO.Directory
 Exposes static methods for creating, moving, and enumerating
through directories and subdirectories. This class cannot be
inherited.

4.  Public Attributes
 Gets or sets the attributes for the current file or directory.
(Inherited from FileSystemInfo.)
 Public CreationTime
 Gets or sets the creation time of the current file or directory.
(Inherited from FileSystemInfo.)
 Public property CreationTimeUtc
 Gets or sets the creation time, in coordinated universal time
(UTC), of the current file or directory. (Inherited from
FileSystemInfo.)

5.  Public Directory
 Gets an instance of the parent directory.
 Public DirectoryName
 Gets a string representing the directory's full path.
 Public Exists
 Gets a value indicating whether a file exists. (Overrides
FileSystemInfo.Exists.)

6.  Public Extension
 Gets the string representing the extension part of the file.
(Inherited from FileSystemInfo.)
 Public FullName
 Gets the full path of the directory or file. (Inherited from
FileSystemInfo.)
 Public property IsReadOnly
 Gets or sets a value that determines if the current file is read
only.

7.  Public LastAccessTime
 Gets or sets the time the current file or directory was last
accessed. (Inherited from FileSystemInfo.)
 Public property LastAccessTimeUtc
 Gets or sets the time, in coordinated universal time (UTC),
that the current file or directory was last accessed. (Inherited
from FileSystemInfo.)
 Public LastWriteTime
 Gets or sets the time when the current file or directory was last
written to. (Inherited from FileSystemInfo.)

8.  Public property LastWriteTimeUtc
 Gets or sets the time, in coordinated universal time (UTC),
when the current file or directory was last written to.
(Inherited from FileSystemInfo.)
 Public Length
 Gets the size, in bytes, of the current file.
 Public Name
 Gets the name of the file. (Overrides FileSystemInfo.Name.)

9. DirectoryInfo Class
 Exposes instance methods for creating, moving, and
enumerating through directories and subdirectories.
This class cannot be inherited.
 Properties

10.  Public property Attributes
 Gets or sets the attributes for the current file or directory.
(Inherited from FileSystemInfo.)
 Public property CreationTime
 Gets or sets the creation time of the current file or directory.
(Inherited from FileSystemInfo.)
 Public property CreationTimeUtc
 Gets or sets the creation time, in coordinated universal time
(UTC), of the current file or directory. (Inherited from
FileSystemInfo.)

11.  Public Exists
 Gets a value indicating whether the directory exists.
(Overrides FileSystemInfo.Exists.)
 Public Extension
 Gets the string representing the extension part of the file.
(Inherited from FileSystemInfo.)
 Public FullName
 Gets the full path of the directory or file. (Inherited from
FileSystemInfo.)

12.  Public LastAccessTime
 Gets or sets the time the current file or directory was last
accessed. (Inherited from FileSystemInfo.)
 Public LastAccessTimeUtc
 Gets or sets the time, in coordinated universal time (UTC),
that the current file or directory was last accessed. (Inherited
from FileSystemInfo.)
 Public LastWriteTime
 Gets or sets the time when the current file or directory was
last written to. (Inherited from FileSystemInfo.)

13.  Public property LastWriteTimeUtc
 Gets or sets the time, in coordinated universal time (UTC),
when the current file or directory was last written to.
(Inherited from FileSystemInfo.)
 Public Name
 Gets the name of this DirectoryInfo instance. (Overrides
FileSystemInfo.Name.)
 Public Parent
 Gets the parent directory of a specified subdirectory.
 Public Root
 Gets the root portion of the directory.

14. System.IO.DriveInfo
 Public property AvailableFreeSpace
 Indicates the amount of available free space on a drive, in
bytes.
 Public property DriveFormat
 Gets the name of the file system, such as NTFS or FAT32.
 Public property DriveType
 Gets the drive type, such as CD-ROM, removable, network,
or fixed.

15.  Public property IsReady
 Gets a value that indicates whether a drive is ready.
 Public property Name
 Gets the name of a drive, such as C:.
 Public property RootDirectory
 Gets the root directory of a drive.

16.  Public property TotalFreeSpace
 Gets the total amount of free space available on a drive, in
bytes.
 Public property TotalSize
 Gets the total size of storage space on a drive, in bytes.
 Public property VolumeLabel
 Gets or sets the volume label of a drive.

17. Methods DriveInfo and Example
 GetDrives()
Retrieves the drive names of all logical drives on a
computer.

18. Directory Class
 Methods
 Delete(String)
 Deletes an empty directory from a specified path.
 Exists()
 Determines whether the given path refers to an existing directory
on disk.
 GetAccessControl(String)
 Gets a DirectorySecurity object that encapsulates the access
control list (ACL) entries for a specified directory
 GetCurrentDirectory()
 Returns the names of subdirectories (including their paths) in the
specified directory.

19. Example of Drive Info
public static void Main()
{
DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo d in allDrives)
{
Console.WriteLine("Drive {0}", d.Name);
Console.WriteLine(" File type: {0}", d.DriveType);
if (d.IsReady == true)
{
Console.WriteLine(" Volume label: {0}", d.VolumeLabel);
Console.WriteLine(" File system: {0}", d.DriveFormat);
Console.WriteLine(
" Available space to current user:{0, 15} bytes",
d.AvailableFreeSpace);
Console.WriteLine(
" Total available space: {0, 15} bytes",
d.TotalFreeSpace);
Console.WriteLine(
" Total size of drive: {0, 15} bytes ",
d.TotalSize);
}
}
System.Console.ReadLine();
}

20. Drive C:
File type: Fixed
Volume label: Windows
File system: NTFS
Available space to current user: 135662944256 bytes
Total available space: 135662944256 bytes
Total size of drive: 320070479872 bytes
Drive D:
File type: CDRom
Drive Q:
File type: Fixed

21.  Example of File info
 Total PhysicalMemory example