From 4b4aad7217d3292650e77eec2cf4c198ea9c3b4b Mon Sep 17 00:00:00 2001
From: Jiyoung Yun <jy910.yun@samsung.com>
Date: Wed, 23 Nov 2016 19:09:09 +0900
Subject: Imported Upstream version 1.1.0

---
 src/mscorlib/src/System/IO/FileOptions.cs | 47 +++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/mscorlib/src/System/IO/FileOptions.cs

(limited to 'src/mscorlib/src/System/IO/FileOptions.cs')

diff --git a/src/mscorlib/src/System/IO/FileOptions.cs b/src/mscorlib/src/System/IO/FileOptions.cs
new file mode 100644
index 0000000000..ffd6ddad90
--- /dev/null
+++ b/src/mscorlib/src/System/IO/FileOptions.cs
@@ -0,0 +1,47 @@
+// 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:   FileOptions
+** 
+** 
+**
+**
+** Purpose: Additional options to how to create a FileStream.
+**    Exposes the more obscure CreateFile functionality.
+**
+**
+===========================================================*/
+
+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.
+    [Serializable]
+    [Flags]
+    [ComVisible(true)]
+    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
+    }
+}
+
-- 
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