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FileAccess Enumeration

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

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

[SerializableAttribute] 
[FlagsAttribute] 
[ComVisibleAttribute(true)] 
public enum FileAccess
/** @attribute SerializableAttribute() */ 
/** @attribute FlagsAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public enum FileAccess
SerializableAttribute 
FlagsAttribute 
ComVisibleAttribute(true) 
public enum FileAccess

 Member nameDescription
Supported by the .NET Compact FrameworkReadRead access to the file. Data can be read from the file. Combine with Write for read/write access. 
Supported by the .NET Compact FrameworkReadWriteRead and write access to the file. Data can be written to and read from the file. 
Supported by the .NET Compact FrameworkWriteWrite access to the file. Data can be written to the file. Combine with Read for read/write access. 

For an example of creating a file and writing text to a file, see How to: Write Text to a File. For an example of reading text from a file, see How to: Read Text from a File. For an example of reading from and writing to a binary file, see How to: Read and Write to a Newly Created Data File.

A FileAccess parameter is specified in many of the constructors for File, FileInfo, FileStream, and other constructors where it is important to control the kind of access users have to a file.

The following FileStream constructor grants read-only access to an existing file (FileAccess.Read).

FileStream s2 = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read);

FileStream s2 = new FileStream(name, FileMode.Open, 
    FileAccess.Read, FileShare.Read);

var s2 : FileStream = new FileStream(name, FileMode.Open, FileAccess.Read, FileShare.Read);

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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