System.IO Namespace
.NET Framework 3.0
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. |
![]() | FileFormatException | The exception that is thrown when an input file or a data stream that is supposed to conform to a certain file format specification is malformed. |
![]() | 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. |
![]() | PipeException | |
![]() | 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. |
Community Additions
ADD
Show:



