I am trying to replace EF5 with EF6
A lot of my code is giving type reference errors,
Should I replace System.Data.Objects with System.Data.Entity.Core.Objects in my refere
The general rule for namespace changes is that any type in System.Data.* is moved to System.Data.Entity.Core.*. In other words, just insert Entity.Core. after System.Data.
In other words, yes, you should update your references to the new namespace.