mono/netcore/System.Private.CoreLib/shared/System/IO/FileShare.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

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.
    //
    // Note these values currently match the values for FILE_SHARE_READ,
    // FILE_SHARE_WRITE, and FILE_SHARE_DELETE in winnt.h
    //
    [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.
        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.
        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.
        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.
        ReadWrite = 3,

        // Open the file, but allow someone else to delete the file.
        Delete = 4,

        // Whether the file handle should be inheritable by child processes.
        // Note this is not directly supported like this by Win32.
        Inheritable = 0x10,
    }
}