updated comments

src/VisualStudio/Core/Def/Implementation/Options/RoamingVisualStudioProfileOptionPersister.cs

@@ -176,8 +176,9 @@ public bool TryFetch(OptionKey optionKey, out object value)
             }
             else if (optionKey.Option.Type == typeof(bool?))
             {
-                // when nullable type is assigned to object, it can lose nullable type.
-                return (value is bool?) || (value is bool) || (value == null);
+                // code uses object to hold onto any value which will use boxing on value types.
+                // see boxing on nullable types - https://msdn.microsoft.com/en-us/library/ms228597.aspx
+                return (value is bool) || (value == null);
             }
             else if (value != null && optionKey.Option.Type != value.GetType())
             {