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// 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.
/*============================================================
**
** Enum: FileMode
**
**
**
**
** Purpose: Enum describing whether to create a new file or
** open an existing one.
**
**
===========================================================*/
using System;
namespace System.IO {
// Contains constants for specifying how the OS should open a file.
// These will control whether you overwrite a file, open an existing
// file, or some combination thereof.
//
// To append to a file, use Append (which maps to OpenOrCreate then we seek
// to the end of the file). To truncate a file or create it if it doesn't
// exist, use Create.
//
[Serializable]
public enum FileMode
{
// Creates a new file. An exception is raised if the file already exists.
CreateNew = 1,
// Creates a new file. If the file already exists, it is overwritten.
Create = 2,
// Opens an existing file. An exception is raised if the file does not exist.
Open = 3,
// Opens the file if it exists. Otherwise, creates a new file.
OpenOrCreate = 4,
// Opens an existing file. Once opened, the file is truncated so that its
// size is zero bytes. The calling process must open the file with at least
// WRITE access. An exception is raised if the file does not exist.
Truncate = 5,
// Opens the file if it exists and seeks to the end. Otherwise,
// creates a new file.
Append = 6,
}
}
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