From 9f06225ad711284e8fe001f10edb52c1dc0fc94c Mon Sep 17 00:00:00 2001
From: batzen <batzen@gmx.org>
Date: Thu, 27 Nov 2014 23:14:45 +0100
Subject: [PATCH] Fixes #25 by checking if Menu is present in Ribbon

---
 Fluent/Services/KeyTipService.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Fluent/Services/KeyTipService.cs b/Fluent/Services/KeyTipService.cs
index 8bcc780f4..70a9549df 100644
--- a/Fluent/Services/KeyTipService.cs
+++ b/Fluent/Services/KeyTipService.cs
@@ -371,6 +371,11 @@ private void Show()
 
         private Backstage GetBackstage()
         {
+            if (this.ribbon.Menu == null)
+            {
+                return null;
+            }
+
             var control = this.ribbon.Menu as Backstage ?? UIHelper.FindImmediateVisualChild<Backstage>(this.ribbon.Menu, obj => obj.Visibility == Visibility.Visible && obj.IsOpen);
 
             if (control == null)
@@ -385,6 +390,11 @@ private Backstage GetBackstage()
 
         private ApplicationMenu GetApplicationMenu()
         {
+            if (this.ribbon.Menu == null)
+            {
+                return null;
+            }
+
             var control = this.ribbon.Menu as ApplicationMenu ?? UIHelper.FindImmediateVisualChild<ApplicationMenu>(this.ribbon.Menu, obj => obj.Visibility == Visibility.Visible);
 
             if (control == null)