Where did System.Reflection.MemberTypes go in DNX 5.0?

.net 4.5 had it. Where is it in DNXCore v5?

My specific error message is: DNXCore,Version=v5.0 error CS0103: The name 'MemberTypes' does not exist in the current context.

In previous .nets, it was an Enum on System.Reflection and would be the result of obj.GetType().GetMember(memberName).MemberType (Field, Property, etc)