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-rw-r--r--src/mscorlib/shared/System/IO/FileOptions.cs33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/IO/FileOptions.cs b/src/mscorlib/shared/System/IO/FileOptions.cs
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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.
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace System.IO
+{
+ // Maps to FILE_FLAG_DELETE_ON_CLOSE and similar values from winbase.h.
+ // We didn't expose a number of these values because we didn't believe
+ // a number of them made sense in managed code, at least not yet.
+ [Flags]
+ public enum FileOptions
+ {
+ // NOTE: any change to FileOptions enum needs to be
+ // matched in the FileStream ctor for error validation
+ None = 0,
+ WriteThrough = unchecked((int)0x80000000),
+ Asynchronous = unchecked((int)0x40000000), // FILE_FLAG_OVERLAPPED
+ // NoBuffering = 0x20000000,
+ RandomAccess = 0x10000000,
+ DeleteOnClose = 0x04000000,
+ SequentialScan = 0x08000000,
+ // AllowPosix = 0x01000000, // FILE_FLAG_POSIX_SEMANTICS
+ // BackupOrRestore,
+ // DisallowReparsePoint = 0x00200000, // FILE_FLAG_OPEN_REPARSE_POINT
+ // NoRemoteRecall = 0x00100000, // FILE_FLAG_OPEN_NO_RECALL
+ // FirstPipeInstance = 0x00080000, // FILE_FLAG_FIRST_PIPE_INSTANCE
+ Encrypted = 0x00004000, // FILE_ATTRIBUTE_ENCRYPTED
+ }
+}
+