49 lines
1.6 KiB
C#
49 lines
1.6 KiB
C#
// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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/*============================================================
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**
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** Enum: FileOptions
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**
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** <OWNER>gpaperin</OWNER>
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**
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**
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** Purpose: Additional options to how to create a FileStream.
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** Exposes the more obscure CreateFile functionality.
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**
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**
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===========================================================*/
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using System;
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using System.Runtime.InteropServices;
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namespace System.IO {
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// Maps to FILE_FLAG_DELETE_ON_CLOSE and similar values from winbase.h.
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// We didn't expose a number of these values because we didn't believe
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// a number of them made sense in managed code, at least not yet.
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[Serializable]
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[Flags]
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[ComVisible(true)]
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public enum FileOptions
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{
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// NOTE: any change to FileOptions enum needs to be
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// matched in the FileStream ctor for error validation
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None = 0,
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WriteThrough = unchecked((int)0x80000000),
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Asynchronous = unchecked((int)0x40000000), // FILE_FLAG_OVERLAPPED
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// NoBuffering = 0x20000000,
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RandomAccess = 0x10000000,
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DeleteOnClose = 0x04000000,
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SequentialScan = 0x08000000,
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// AllowPosix = 0x01000000, // FILE_FLAG_POSIX_SEMANTICS
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// BackupOrRestore,
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// DisallowReparsePoint = 0x00200000, // FILE_FLAG_OPEN_REPARSE_POINT
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// NoRemoteRecall = 0x00100000, // FILE_FLAG_OPEN_NO_RECALL
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// FirstPipeInstance = 0x00080000, // FILE_FLAG_FIRST_PIPE_INSTANCE
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Encrypted = 0x00004000, // FILE_ATTRIBUTE_ENCRYPTED
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}
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}
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