1 files changed, 45 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/IO/FileShare.cs b/src/mscorlib/shared/System/IO/FileShare.cs
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index 0000000000..e9b9b5e32f
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+++ b/src/mscorlib/shared/System/IO/FileShare.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;
+
+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,
+    }
+}