Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Activities/Microsoft/VisualBasic/Activities/VisualBasic.cs

@@ -0,0 +1,50 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//-----------------------------------------------------------------------------
+
+namespace Microsoft.VisualBasic.Activities
+{
+    using System;
+    using System.Activities;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Runtime;
+    using System.Xaml;
+
+    [SuppressMessage(FxCop.Category.Naming, FxCop.Rule.TypeNamesShouldNotMatchNamespaces,
+        Justification = "Approved name")]
+    public static class VisualBasic
+    {
+        static AttachableMemberIdentifier settingsPropertyID = new AttachableMemberIdentifier(typeof(VisualBasic), "Settings");
+
+        public static void SetSettings(object target, VisualBasicSettings value)
+        {
+            AttachablePropertyServices.SetProperty(target, settingsPropertyID, value);
+        }
+
+        public static VisualBasicSettings GetSettings(object target)
+        {
+            VisualBasicSettings value;
+            return AttachablePropertyServices.TryGetProperty(target, settingsPropertyID, out value) ? value : null;
+        }
+
+        public static void SetSettingsForImplementation(object target, VisualBasicSettings value)
+        {
+            if (value != null)
+            {
+                value.SuppressXamlSerialization = true;
+            }
+            SetSettings(target, value);
+        }
+
+        public static bool ShouldSerializeSettings(object target)
+        {
+            VisualBasicSettings settings = VisualBasic.GetSettings(target);
+
+            if (settings != null && settings.SuppressXamlSerialization && target is Activity)
+            {
+                return false;
+            }
+            return true;
+        }
+    }
+}