singrdk/base/Libraries/System.IO/FileShare.cs

// ==++==
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--==
//============================================================
//
// Enum:   FileShare
//
// Purpose: Enum describing how to share files with other
// processes - ie, whether two processes can simultaneously
// read from the same file.
//
//===========================================================  

using System;

namespace System.IO
{
    // 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.
    //
    //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare"]/*' />
    [Flags]
    public enum FileShare
    {
        // No sharing. Any request to open the file (by this process or another
        // process) will fail until the file is closed.
        //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare.None"]/*' />
        None = 0,

        // 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.
        //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare.Read"]/*' />
        Read = 1,

        // 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.
        //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare.Write"]/*' />
        Write = 2,

        // Allows subsequent opening of the file for writing or reading. If this flag
        // is not specified, any request to open the file for writing or reading (by
        // this process or another process) will fail until the file is closed.
        //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare.ReadWrite"]/*' />
        ReadWrite = 3,


        // Whether the file handle should be inheritable by child processes.
        // Note this is not directly supported like this by Win32.
        //| <include file='doc\FileShare.uex' path='docs/doc[@for="FileShare.Inheritable"]/*' />
        Inheritable = 0x10,
    }
}