System.​IO Namespace

Definition

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.

Classes

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.

To browse the .NET Framework source code for this type, see the Reference Source.

DirectoryInfo

Exposes instance methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited.

To browse the .NET Framework source code for this type, see the Reference Source.

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 a single file, and aids in the creation of FileStream objects.

To browse the .NET Framework source code for this type, see the Reference Source.

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 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.

To browse the .NET Framework source code for this type, see the Reference Source.

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

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

To browse the .NET Framework source code for this type, see the Reference Source.

FileSystemAclExtensions
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.

To browse the .NET Framework source code for this type, see the Reference Source.

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.

To browse the .NET Framework source code for this type, see the Reference Source.

Path

Performs operations on String instances that contain file or directory path information. These operations are performed in a cross-platform manner.

To browse the .NET Framework source code for this type, see the Reference Source.

PathTooLongException

The exception that is thrown when a path or fully qualified file name is longer than the system-defined maximum length.

PipeException

Thrown when an error occurs within a named pipe.

RenamedEventArgs

Provides data for the Renamed event.

Stream

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

To browse the .NET Framework source code for this type, see the Reference Source.

StreamReader

Implements a TextReader that reads characters from a byte stream in a particular encoding.

To browse the .NET Framework source code for this type, see the Reference Source.

StreamWriter

Implements a TextWriter for writing characters to a stream in a particular encoding.

To browse the .NET Framework source code for this type, see the Reference Source.

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.

UnmanagedMemoryAccessor

Provides random access to unmanaged blocks of memory from managed code.

UnmanagedMemoryStream

Provides access to unmanaged blocks of memory from managed code.

Structs

WaitForChangedResult

Contains information on the change that occurred.

Enums

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 advanced options for creating a FileStream object.

FileShare

Contains constants for controlling the kind of access other FileStream objects can have to the same file.

HandleInheritability

Specifies whether the underlying handle is inheritable by child processes.

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

Specifies the position in a stream to use for seeking.

WatcherChangeTypes

Changes that might occur to a file or directory.

Delegates

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.