Classes
class	BinaryReader
	Reads primitive data types as binary values in a specific encoding. More...

class	BinaryWriter
	Writes primitive types in binary to a stream and supports writing strings in a specific encoding. More...

class	BufferedStream
	Adds a buffering layer to read and write operations on another stream. This class cannot be inherited. More...

class	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. More...

class	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. More...

class	DirectoryNotFoundException
	The exception that is thrown when part of a file or directory cannot be found. More...

class	DriveInfo
	Provides access to information on a drive. More...

class	DriveNotFoundException
	The exception that is thrown when trying to access a drive or share that is not available. More...

class	EndOfStreamException
	The exception that is thrown when reading is attempted past the end of a stream. More...

class	ErrorEventArgs
	Provides data for the E:System.IO.FileSystemWatcher.Error event. More...

class	File
	Provides static methods for the creation, copying, deletion, moving, and opening of a single file, and aids in the creation of T:System.IO.FileStream objects.To browse the .NET Framework source code for this type, see the Reference Source. More...

class	FileInfo
	Provides properties and instance methods for the creation, copying, deletion, moving, and opening of files, and aids in the creation of T:System.IO.FileStream objects. This class cannot be inherited.To browse the .NET Framework source code for this type, see the Reference Source. More...

class	FileLoadException
	The exception that is thrown when a managed assembly is found but cannot be loaded. More...

class	FileNotFoundException
	The exception that is thrown when an attempt to access a file that does not exist on disk fails. More...

class	FileStream
	Provides a T:System.IO.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. More...

class	FileSystemEventArgs
	Provides data for the directory events: E:System.IO.FileSystemWatcher.Changed, E:System.IO.FileSystemWatcher.Created, E:System.IO.FileSystemWatcher.Deleted. More...

class	FileSystemInfo
	Provides the base class for both T:System.IO.FileInfo and T:System.IO.DirectoryInfo objects. More...

class	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. More...

class	InternalBufferOverflowException
	The exception thrown when the internal buffer overflows. More...

class	InvalidDataException
	The exception that is thrown when a data stream is in an invalid format. More...

class	IODescriptionAttribute
	Sets the description visual designers can display when referencing an event, extender, or property. More...

class	IOException
	The exception that is thrown when an I/O error occurs. More...

class	MemoryStream
	Creates a stream whose backing store is memory.To browse the .NET Framework source code for this type, see the Reference Source. More...

class	Path
	Performs operations on T:System.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. More...

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

class	RenamedEventArgs
	Provides data for the E:System.IO.FileSystemWatcher.Renamed event. More...

class	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. More...

class	StreamReader
	Implements a T:System.IO.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. More...

class	StreamWriter
	Implements a T:System.IO.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. More...

class	StringReader
	Implements a T:System.IO.TextReader that reads from a string. More...

class	StringWriter
	Implements a T:System.IO.TextWriter for writing information to a string. The information is stored in an underlying T:System.Text.StringBuilder. More...

class	TextReader
	Represents a reader that can read a sequential series of characters. More...

class	TextWriter
	Represents a writer that can write a sequential series of characters. This class is abstract. More...

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

class	UnmanagedMemoryStream
	Provides access to unmanaged blocks of memory from managed code. More...

struct	WaitForChangedResult
	Contains information on the change that occurred. More...

Enumerations
enum	DriveType { DriveType.Unknown, DriveType.NoRootDirectory, DriveType.Removable, DriveType.Fixed, DriveType.Network, DriveType.CDRom, DriveType.Ram }
	Defines constants for drive types, including CDRom, Fixed, Network, NoRootDirectory, Ram, Removable, and Unknown. More...

enum	FileAccess { FileAccess.Read = 0x1, FileAccess.Write = 0x2, FileAccess.ReadWrite = 0x3 }
	Defines constants for read, write, or read/write access to a file. More...

enum	FileAttributes { FileAttributes.ReadOnly = 0x1, FileAttributes.Hidden = 0x2, FileAttributes.System = 0x4, FileAttributes.Directory = 0x10, FileAttributes.Archive = 0x20, FileAttributes.Device = 0x40, FileAttributes.Normal = 0x80, FileAttributes.Temporary = 0x100, FileAttributes.SparseFile = 0x200, FileAttributes.ReparsePoint = 0x400, FileAttributes.Compressed = 0x800, FileAttributes.Offline = 0x1000, FileAttributes.NotContentIndexed = 0x2000, FileAttributes.Encrypted = 0x4000, FileAttributes.IntegrityStream = 0x8000, FileAttributes.NoScrubData = 0x20000 }
	Provides attributes for files and directories. More...

enum	FileMode { FileMode.CreateNew = 1, FileMode.Create, FileMode.Open, FileMode.OpenOrCreate, FileMode.Truncate, FileMode.Append }
	Specifies how the operating system should open a file. More...

enum	FileOptions { FileOptions.None = 0x0, FileOptions.WriteThrough = int.MinValue, FileOptions.Asynchronous = 0x40000000, FileOptions.RandomAccess = 0x10000000, FileOptions.DeleteOnClose = 0x4000000, FileOptions.SequentialScan = 0x8000000, FileOptions.Encrypted = 0x4000 }
	Represents advanced options for creating a T:System.IO.FileStream object. More...

enum	FileSecurityStateAccess { NoAccess = 0x0, Read = 0x1, Write = 0x2, Append = 0x4, PathDiscovery = 0x8, AllAccess = 0xF }

enum	FileShare { FileShare.None = 0x0, FileShare.Read = 0x1, FileShare.Write = 0x2, FileShare.ReadWrite = 0x3, FileShare.Delete = 0x4, FileShare.Inheritable = 0x10 }
	Contains constants for controlling the kind of access other T:System.IO.FileStream objects can have to the same file. More...

enum	HandleInheritability { HandleInheritability.None, HandleInheritability.Inheritable }
	Specifies whether the underlying handle is inheritable by child processes. More...

enum	LogRetentionOption { SingleFileUnboundedSize = 2, SingleFileBoundedSize = 4, UnlimitedSequentialFiles = 0, LimitedSequentialFiles = 3, LimitedCircularFiles = 1 }

enum	NotifyFilters { NotifyFilters.FileName = 0x1, NotifyFilters.DirectoryName = 0x2, NotifyFilters.Attributes = 0x4, NotifyFilters.Size = 0x8, NotifyFilters.LastWrite = 0x10, NotifyFilters.LastAccess = 0x20, NotifyFilters.CreationTime = 0x40, NotifyFilters.Security = 0x100 }
	Specifies changes to watch for in a file or folder. More...

enum	SearchOption { SearchOption.TopDirectoryOnly, SearchOption.AllDirectories }
	Specifies whether to search the current directory, or the current directory and all subdirectories. More...

enum	SeekOrigin { SeekOrigin.Begin, SeekOrigin.Current, SeekOrigin.End }
	Specifies the position in a stream to use for seeking. More...

enum	WatcherChangeTypes { WatcherChangeTypes.Created = 0x1, WatcherChangeTypes.Deleted = 0x2, WatcherChangeTypes.Changed = 0x4, WatcherChangeTypes.Renamed = 0x8, WatcherChangeTypes.All = 0xF }
	Changes that might occur to a file or directory. More...

Functions
delegate void	ErrorEventHandler (object sender, ErrorEventArgs e)
	Represents the method that will handle the E:System.IO.FileSystemWatcher.Error event of a T:System.IO.FileSystemWatcher object. More...

delegate void	FileSystemEventHandler (object sender, FileSystemEventArgs e)
	Represents the method that will handle the E:System.IO.FileSystemWatcher.Changed, E:System.IO.FileSystemWatcher.Created, or E:System.IO.FileSystemWatcher.Deleted event of a T:System.IO.FileSystemWatcher class. More...

delegate void	RenamedEventHandler (object sender, RenamedEventArgs e)
	Represents the method that will handle the E:System.IO.FileSystemWatcher.Renamed event of a T:System.IO.FileSystemWatcher class. More...

Enumeration Type Documentation

◆ DriveType

enum System.IO.DriveType

strong

Defines constants for drive types, including CDRom, Fixed, Network, NoRootDirectory, Ram, Removable, and Unknown.

Enumerator
Unknown	The type of drive is unknown.
NoRootDirectory	The drive does not have a root directory.
Removable	The drive is a removable storage device, such as a floppy disk drive or a USB flash drive.
Fixed	The drive is a fixed disk.
Network	The drive is a network drive.
CDRom	The drive is an optical disc device, such as a CD or DVD-ROM.
Ram	The drive is a RAM disk.

Definition at line 8 of file DriveType.cs.

◆ FileAccess

enum System.IO.FileAccess

strong

Defines constants for read, write, or read/write access to a file.

Enumerator
Read	Read access to the file. Data can be read from the file. Combine with `Write` for read/write access.
Write	Write access to the file. Data can be written to the file. Combine with `Read` for read/write access.
ReadWrite	Read and write access to the file. Data can be written to and read from the file.

Definition at line 9 of file FileAccess.cs.

◆ FileAttributes

enum System.IO.FileAttributes

strong

Provides attributes for files and directories.

Enumerator
ReadOnly	The file is read-only.
Hidden	The file is hidden, and thus is not included in an ordinary directory listing.
System	The file is a system file. That is, the file is part of the operating system or is used exclusively by the operating system.
Directory	The file is a directory.
Archive	The file is a candidate for backup or removal.
Device	Reserved for future use.
Normal	The file is a standard file that has no special attributes. This attribute is valid only if it is used alone.
Temporary	The file is temporary. A temporary file contains data that is needed while an application is executing but is not needed after the application is finished. File systems try to keep all the data in memory for quicker access rather than flushing the data back to mass storage. A temporary file should be deleted by the application as soon as it is no longer needed.
SparseFile	The file is a sparse file. Sparse files are typically large files whose data consists of mostly zeros.
ReparsePoint	The file contains a reparse point, which is a block of user-defined data associated with a file or a directory.
Compressed	The file is compressed.
Offline	The file is offline. The data of the file is not immediately available.
NotContentIndexed	The file will not be indexed by the operating system's content indexing service.
Encrypted	The file or directory is encrypted. For a file, this means that all data in the file is encrypted. For a directory, this means that encryption is the default for newly created files and directories.
IntegrityStream	The file or directory includes data integrity support. When this value is applied to a file, all data streams in the file have integrity support. When this value is applied to a directory, all new files and subdirectories within that directory, by default, include integrity support.
NoScrubData	The file or directory is excluded from the data integrity scan. When this value is applied to a directory, by default, all new files and subdirectories within that directory are excluded from data integrity.

Definition at line 9 of file FileAttributes.cs.

◆ FileMode

enum System.IO.FileMode

strong

Specifies how the operating system should open a file.

Enumerator
CreateNew	Specifies that the operating system should create a new file. This requires F:System.Security.Permissions.FileIOPermissionAccess.Write permission. If the file already exists, an T:System.IO.IOException exception is thrown.
Create	Specifies that the operating system should create a new file. If the file already exists, it will be overwritten. This requires F:System.Security.Permissions.FileIOPermissionAccess.Write permission. `FileMode.Create` is equivalent to requesting that if the file does not exist, use F:System.IO.FileMode.CreateNew; otherwise, use F:System.IO.FileMode.Truncate. If the file already exists but is a hidden file, an T:System.UnauthorizedAccessException exception is thrown.
Open	Specifies that the operating system should open an existing file. The ability to open the file is dependent on the value specified by the T:System.IO.FileAccess enumeration. A T:System.IO.FileNotFoundException exception is thrown if the file does not exist.
OpenOrCreate	Specifies that the operating system should open a file if it exists; otherwise, a new file should be created. If the file is opened with `FileAccess.Read`, F:System.Security.Permissions.FileIOPermissionAccess.Read permission is required. If the file access is `FileAccess.Write`, F:System.Security.Permissions.FileIOPermissionAccess.Write permission is required. If the file is opened with `FileAccess.ReadWrite`, both F:System.Security.Permissions.FileIOPermissionAccess.Read and F:System.Security.Permissions.FileIOPermissionAccess.Write permissions are required.
Truncate	Specifies that the operating system should open an existing file. When the file is opened, it should be truncated so that its size is zero bytes. This requires F:System.Security.Permissions.FileIOPermissionAccess.Write permission. Attempts to read from a file opened with `FileMode.Truncate` cause an T:System.ArgumentException exception.
Append	Opens the file if it exists and seeks to the end of the file, or creates a new file. This requires F:System.Security.Permissions.FileIOPermissionAccess.Append permission. `FileMode.Append` can be used only in conjunction with `FileAccess.Write`. Trying to seek to a position before the end of the file throws an T:System.IO.IOException exception, and any attempt to read fails and throws a T:System.NotSupportedException exception.

Definition at line 8 of file FileMode.cs.

◆ FileOptions

enum System.IO.FileOptions

strong

Represents advanced options for creating a T:System.IO.FileStream object.

Enumerator
None	Indicates that no additional options should be used when creating a T:System.IO.FileStream object.
WriteThrough	Indicates that the system should write through any intermediate cache and go directly to disk.
Asynchronous	Indicates that a file can be used for asynchronous reading and writing.
RandomAccess	Indicates that the file is accessed randomly. The system can use this as a hint to optimize file caching.
DeleteOnClose	Indicates that a file is automatically deleted when it is no longer in use.
SequentialScan	Indicates that the file is to be accessed sequentially from beginning to end. The system can use this as a hint to optimize file caching. If an application moves the file pointer for random access, optimum caching may not occur; however, correct operation is still guaranteed.
Encrypted	Indicates that a file is encrypted and can be decrypted only by using the same user account used for encryption.

Definition at line 9 of file FileOptions.cs.

◆ FileShare

enum System.IO.FileShare

strong

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

Enumerator
None	Declines sharing of the current file. Any request to open the file (by this process or another process) will fail until the file is closed.
Read	Allows subsequent opening of the file for reading. If this flag is not specified, any request to open the file for reading (by this process or another process) will fail until the file is closed. However, even if this flag is specified, additional permissions might still be needed to access the file.
Write	Allows subsequent opening of the file for writing. If this flag is not specified, any request to open the file for writing (by this process or another process) will fail until the file is closed. However, even if this flag is specified, additional permissions might still be needed to access the file.
ReadWrite	Allows subsequent opening of the file for reading or writing. If this flag is not specified, any request to open the file for reading or writing (by this process or another process) will fail until the file is closed. However, even if this flag is specified, additional permissions might still be needed to access the file.
Delete	Allows subsequent deleting of a file.
Inheritable	Makes the file handle inheritable by child processes. This is not directly supported by Win32.

Definition at line 9 of file FileShare.cs.

◆ HandleInheritability

enum System.IO.HandleInheritability

strong

Specifies whether the underlying handle is inheritable by child processes.

Enumerator
None	Specifies that the handle is not inheritable by child processes.
Inheritable	Specifies that the handle is inheritable by child processes.

Definition at line 6 of file HandleInheritability.cs.

◆ NotifyFilters

enum System.IO.NotifyFilters

strong

Specifies changes to watch for in a file or folder.

Enumerator
FileName	The name of the file.
DirectoryName	The name of the directory.
Attributes	The attributes of the file or folder.
Size	The size of the file or folder.
LastWrite	The date the file or folder last had anything written to it.
LastAccess	The date the file or folder was last opened.
CreationTime	The time the file or folder was created.
Security	The security settings of the file or folder.

Definition at line 5 of file NotifyFilters.cs.

◆ SearchOption

enum System.IO.SearchOption

strong

Specifies whether to search the current directory, or the current directory and all subdirectories.

Enumerator
TopDirectoryOnly	Includes only the current directory in a search operation.
AllDirectories	Includes the current directory and all its subdirectories in a search operation. This option includes reparse points such as mounted drives and symbolic links in the search.

Definition at line 8 of file SearchOption.cs.

◆ SeekOrigin

enum System.IO.SeekOrigin

strong

Specifies the position in a stream to use for seeking.

Enumerator
Begin	Specifies the beginning of a stream.
Current	Specifies the current position within a stream.
End	Specifies the end of a stream.

Definition at line 9 of file SeekOrigin.cs.

◆ WatcherChangeTypes

enum System.IO.WatcherChangeTypes

strong

Changes that might occur to a file or directory.

Enumerator
Created	The creation of a file or folder.
Deleted	The deletion of a file or folder.
Changed	The change of a file or folder. The types of changes include: changes to size, attributes, security settings, last write, and last access time.
Renamed	The renaming of a file or folder.
All	The creation, deletion, change, or renaming of a file or folder.

Definition at line 5 of file WatcherChangeTypes.cs.

Function Documentation

◆ ErrorEventHandler()

delegate void System.IO.ErrorEventHandler	(	object	sender,
		ErrorEventArgs	e
	)

Represents the method that will handle the E:System.IO.FileSystemWatcher.Error event of a T:System.IO.FileSystemWatcher object.

Parameters

sender	The source of the event.
e	An T:System.IO.ErrorEventArgs object that contains the event data.

◆ FileSystemEventHandler()

delegate void System.IO.FileSystemEventHandler	(	object	sender,
		FileSystemEventArgs	e
	)

Represents the method that will handle the E:System.IO.FileSystemWatcher.Changed, E:System.IO.FileSystemWatcher.Created, or E:System.IO.FileSystemWatcher.Deleted event of a T:System.IO.FileSystemWatcher class.

Parameters

sender	The source of the event.
e	The T:System.IO.FileSystemEventArgs that contains the event data.

◆ RenamedEventHandler()

delegate void System.IO.RenamedEventHandler	(	object	sender,
		RenamedEventArgs	e
	)

Represents the method that will handle the E:System.IO.FileSystemWatcher.Renamed event of a T:System.IO.FileSystemWatcher class.

Parameters

sender	The source of the event.
e	The T:System.IO.RenamedEventArgs that contains the event data.

Classes

Enumerations

Functions

Enumeration Type Documentation

◆ DriveType

◆ FileAccess

◆ FileAttributes

◆ FileMode

◆ FileOptions

◆ FileShare

◆ HandleInheritability

◆ NotifyFilters

◆ SearchOption

◆ SeekOrigin

◆ WatcherChangeTypes

Function Documentation

◆ ErrorEventHandler()

◆ FileSystemEventHandler()

◆ RenamedEventHandler()