Namespace System.IO

Classes

File

Class for creating FileStream objects, and some basic file management routines such as Delete, etc.

FileStream

Provides a Stream for a file, supporting both synchronous and asynchronous read and write operations.

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.

Stream

Provides a generic view of a sequence of bytes. This is an abstract class.

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.

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.

Enums

FileAccess

Contains constants for specifying the access you want for a file. You can have Read, Write or ReadWrite access.

FileAttributes

Provides attributes for files and directories.

FileMode

Contains constants for specifying how the OS should open a file. These will control whether you overwrite a file, open an existing file, or some combination thereof.

To append to a file, use Append (which maps to OpenOrCreate then we seek to the end of the file). To truncate a file or create it if it doesn't exist, use Create.

FileShare

Contains constants for controlling file sharing options while opening files. You can specify what access other processes trying to open the same file concurrently can have.

IOException.IOExceptionErrorCode

Provides values for error codes.

SeekOrigin

Specifies the position in a stream to use for seeking.