This extension illustrates how a developer can use custom classes as property types on their tasks.

ACT relies on serialization support to persist property values.  At the same time, Workbench relies on Spec-based
metadata to properly save its projects.  Combining the two requires a little coding finess and the need to use
C# to describe the custom class definition.

This is an "advanced" extension to be used only in projects that must use custom property types.