diff --git a/source/fundamentals/serialization/polymorphic-objects.txt b/source/fundamentals/serialization/polymorphic-objects.txt
index 07a4dc92..ccef961d 100644
--- a/source/fundamentals/serialization/polymorphic-objects.txt
+++ b/source/fundamentals/serialization/polymorphic-objects.txt
@@ -161,13 +161,6 @@ you must explicitly list each class you're looking for:
        item.GetType() == typeof(Lion) ||
        item.GetType() == typeof(Tiger));
 
-.. note:: OfType<T>() and the is Operator
-
-   When checking the type of a scalar discriminator, use the ``Where`` syntax shown in
-   the preceding code example. If you try to use the ``Aggregate().OfType<T>()`` method,
-   or if you pass an expression containing the ``is`` operator to the
-   ``Aggregate().Match()`` method, the driver throws an exception.
-
 .. _csharp-discriminator-hierarchical:
 
 HierarchicalDiscriminatorConvention