add camel case note

Author: mongoKart

source/crud/query/project.txt

@@ -36,6 +36,18 @@ The following class represents the documents in the ``sample_mflix.movies`` coll
 .. literalinclude:: /includes/code-examples/projection/Movie.cs
    :language: csharp
 
+.. note:: ConventionPack for Pascal Case
+   
+   The properties in the preceding class are named in Pascal case, but the
+   field names in the MongoDB collection use camel case. To account for this difference,
+   you can use the following code to register a ``ConventionPack`` when your
+   application starts:
+
+   .. code-block:: csharp
+
+      var camelCaseConvention = new ConventionPack { new CamelCaseElementNameConvention() };
+      ConventionRegistry.Register("CamelCase", camelCaseConvention, type => true);
+
 .. _csharp-projection-methods:
 
 Create a Projection