The defined nested type.
This method can be used to create nested types even after the TypeBuilder.CreateType method has been called on the enclosing type.
The nested type needs to be complete before you can reflect on it using Type.GetMembers, Type.GetNestedType(string), or Type.GetNestedTypes.
See the description of TypeBuilder.CreateType for the order in which nested types and nesting types should be completed.
A duplicate name is not necessarily created if name is identical to the name of a previously defined type or nested type. To be duplicates, the full names must be the same, including the namespace and all nesting types.