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System.IO Namespace
.NET Framework 2.0
The System.IO namespace contains types that allow reading and writing to files and data streams, and types that provide basic file and directory support.
| Class | Description | |
|---|---|---|
 | BinaryReader | Reads primitive data types as binary values in a specific encoding. |
| BinaryWriter | Writes primitive types in binary to a stream and supports writing strings in a specific encoding. |
| BufferedStream | Adds a buffering layer to read and write operations on another stream. This class cannot be inherited. |
| Directory | Exposes static methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited. |
| DirectoryInfo | Exposes instance methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited. |
| DirectoryNotFoundException | The exception that is thrown when part of a file or directory cannot be found. |
| DriveInfo | Provides access to information on a drive. |
| DriveNotFoundException | The exception that is thrown when trying to access a drive or share that is not available. |
| EndOfStreamException | The exception that is thrown when reading is attempted past the end of a stream. |
| ErrorEventArgs | Provides data for the Error event. |
| File | Provides static methods for the creation, copying, deletion, moving, and opening of files, and aids in the creation of FileStream objects. |
| FileInfo | Provides 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. |
| FileLoadException | The exception that is thrown when a managed assembly is found but cannot be loaded. |
| FileNotFoundException | The exception that is thrown when an attempt to access a file that does not exist on disk fails. |
| FileStream | Exposes a Stream around a file, supporting both synchronous and asynchronous read and write operations. |
| FileSystemEventArgs | Provides data for the directory events: Changed, Created, Deleted. |
| FileSystemInfo | Provides the base class for both FileInfo and DirectoryInfo objects. |
| FileSystemWatcher | Listens to the file system change notifications and raises events when a directory, or file in a directory, changes. |
| InternalBufferOverflowException | The exception thrown when the internal buffer overflows. |
| InvalidDataException | The exception that is thrown when a data stream is in an invalid format. |
| IODescriptionAttribute | Sets the description visual designers can display when referencing an event, extender, or property. |
| IOException | The exception that is thrown when an I/O error occurs. |
| MemoryStream | Creates a stream whose backing store is memory. |
| Path | Performs operations on String instances that contain file or directory path information. These operations are performed in a cross-platform manner. |
| PathTooLongException | The exception that is thrown when a pathname or filename is longer than the system-defined maximum length. |
| RenamedEventArgs | Provides data for the Renamed event. |
| Stream | Provides a generic view of a sequence of bytes. |
| StreamReader | Implements a TextReader that reads characters from a byte stream in a particular encoding. |
| StreamWriter | Implements a TextWriter for writing characters to a stream in a particular encoding. |
| StringReader | Implements a TextReader that reads from a string. |
| StringWriter | Implements a TextWriter for writing information to a string. The information is stored in an underlying StringBuilder. |
| TextReader | Represents a reader that can read a sequential series of characters. |
| TextWriter | Represents a writer that can write a sequential series of characters. This class is abstract. |
| UnmanagedMemoryStream | Provides access to unmanaged blocks of memory from managed code. |
| Structure | Description | |
|---|---|---|
 | WaitForChangedResult | Contains information on the change that occurred. |
| Delegate | Description | |
|---|---|---|
 | ErrorEventHandler | Represents the method that will handle the Error event of a FileSystemWatcher object. |
| FileSystemEventHandler | Represents the method that will handle the Changed, Created, or Deleted event of a FileSystemWatcher class. |
| RenamedEventHandler | Represents the method that will handle the Renamed event of a FileSystemWatcher class. |
| Enumeration | Description | |
|---|---|---|
 | DriveType | Defines constants for drive types, including CDRom, Fixed, Network, NoRootDirectory, Ram, Removable, and Unknown. |
| FileAccess | Defines constants for read, write, or read/write access to a file. |
| FileAttributes | Provides attributes for files and directories. |
| FileMode | Specifies how the operating system should open a file. |
| FileOptions | Represents additional options for creating a FileStream object. |
| FileShare | Contains constants for controlling the kind of access other FileStream objects can have to the same file. |
| NotifyFilters | Specifies changes to watch for in a file or folder. |
| SearchOption | Specifies whether to search the current directory, or the current directory and all subdirectories. |
| SeekOrigin | Provides the fields that represent reference points in streams for seeking. |
| WatcherChangeTypes | Changes that might occur to a file or directory. |
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