Help needed finding System.Scripting.Actions library -- DynamicObject

I downloaded a Dynamic sample to test. However, I seem to have run into some problem as I am unable to find one of the referenced libraries

System.Scripting.Actions

I figured it is possible the library may have been renamed or the classes moved to a different namespace. I tried using the Micros开发者_运维知识库oft.Dynamic library but that did not yield acceptable result. Anyone have any idea what library I can actually find the System.Scripting.Actions objects in? Thanks in Advance

Are you using .net 4.0 DLR?

Try the "System.Dynamic" namespace located in the System.Core assembly.