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FileAccess Enum

Definition

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

This enumeration supports a bitwise combination of its member values.

C#
[System.Flags]
public enum FileAccess
C#
[System.Flags]
[System.Serializable]
public enum FileAccess
C#
[System.Flags]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum FileAccess
Inheritance
FileAccess
Attributes

Fields

Name Value Description
Read 1

Read access to the file. Data can be read from the file. Combine with Write for read/write access.

Write 2

Write access to the file. Data can be written to the file. Combine with Read for read/write access.

ReadWrite 3

Read and write access to the file. Data can be written to and read from the file.

Examples

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

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

Remarks

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.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.3, 1.4, 1.6, 2.0, 2.1
UWP 10.0

See also