C# 4.0 dynamic features - Inspecting the Expando class

.NET framework 4.0 has a cool new ExpandoObject class, in System.Dynamic namespace. What makes this special is, it allows you to create an object with members that can be dynamically added and removed at run time. The objective of this post is to examine how the ExpandoObject itself is implemented. To make this clear, let us create a MyExpando class, a minimal implementation of ExpandoObject.