Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Activities/System/Activities/BookmarkOptionsHelper.cs

@@ -0,0 +1,36 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace System.Activities
+{
+    using System;
+    using System.ComponentModel;
+
+    static class BookmarkOptionsHelper
+    {
+        static bool IsDefined(BookmarkOptions options)
+        {
+            return options == BookmarkOptions.None || ((options & (BookmarkOptions.MultipleResume | BookmarkOptions.NonBlocking)) == options);
+        }
+
+        public static void Validate(BookmarkOptions options, string argumentName)
+        {
+            if (!IsDefined(options))
+            {
+                throw FxTrace.Exception.AsError(
+                    new InvalidEnumArgumentException(argumentName, (int)options, typeof(BookmarkOptions)));
+            }
+        }
+
+        public static bool SupportsMultipleResumes(BookmarkOptions options)
+        {
+            return (options & BookmarkOptions.MultipleResume) == BookmarkOptions.MultipleResume;
+        }
+
+        public static bool IsNonBlocking(BookmarkOptions options)
+        {
+            return (options & BookmarkOptions.NonBlocking) == BookmarkOptions.NonBlocking;
+        }
+    }
+}