Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Runtime.Caching/System/Caching/EntryState.cs

@@ -0,0 +1,15 @@
+// <copyright file="EntryState.cs" company="Microsoft">
+//   Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
+// </copyright>
+using System;
+
+namespace System.Runtime.Caching {
+    internal enum EntryState : byte {
+        NotInCache = 0x00,  // Created but not in hashtable
+        AddingToCache = 0x01,  // In hashtable only
+        AddedToCache = 0x02,  // In hashtable + expires + usage
+        RemovingFromCache = 0x04,  // Removed from hashtable only
+        RemovedFromCache = 0x08,  // Removed from hashtable & expires & usage
+        Closed = 0x10,
+    }
+}