Patch from islandjoe@gmail.com

svn path=/trunk/gtk-sharp/; revision=60602

doc/en/Gtk/MenuItem.xml

@@ -142,7 +142,23 @@
       <Docs>
         <summary>Sets or obtains the widget submenu.</summary>
         <value>A submenu for this menu item, or <see langword="null" /> if none.</value>
-        <remarks />
+        <remarks>
+          <example>
+            <code lang="C#">
+// A container:
+Menu mnuFile = new Menu(); 
+ // An item
+MenuItem itmFile = new MenuItem ("_File");
+
+// Add the item into the container:
+itmFile.Submenu = mnuFile;
+//
+
+// Add the newly-created File menu into the menubar:
+menuBar.Add (itmFile);
+  </code>
+          </example>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="AccelPath">