The type 'xxx' is defined in an asembly that is not referenced
As I recently updated a custom DLL file to version 1.0.3483.0, when I included that DLL file in the project, it required version 1.0.3478.
What are the steps I need to follow in order to update the DLL file in a project?
Visual Studio 2015 Error

DLL file version

The DLL file was removed and added, and the project was unloaded and reloaded, but it still does not work.