CreateObject equivalent for C# 4, dynamic keyword, and late binding?

Question

How do I create a dynamic COM/OLE/ActiveX object in C# 4.0 from a program identifier or ProgID (such as \"Word.Application\") without referencing a library?

In C# 3.5 I\

Answer 1

What's wrong with

dynamic myTypeInstance = Activator.CreateInstance(Type.GetTypeFromProgID(typeName, true));

?

If it's a known type name, there's also

dynamic myTypeInstance = Activator.CreateInstance("typeName", "assemblyName");