I understand the refactoring (C #)

<span style= "font-family:arial, Helvetica, Sans-serif; Background-color:rgb (255, 255, 255); " > See an Application interface article today, mainly on how to use. NET built-in features to refactor code, feel a bit of meaning, extract the code from it for future reference. But I have the same question as the author of this article, so refactoring the code is really OK? How is loose coupling achieved? Do not know whether there is a master, you can point? Thank you! </span>

The first is the old code, as follows:

<span style= "FONT-SIZE:18PX;" >public class ClassRegistration     {public        void Create ()         {            //Create registration code         }        public void Transfer ()         {            //class Transfer code         } public        decimal total {get; private set;}     }    public class Registrationprocessor     {public        decimal processregistration (classregistration registration)         {             registration. Create ();            Return registration. Total;         }     } </span>

The following refactoring code:

<span style= "FONT-SIZE:18PX;" >public interface iclassregistration     {        void Create ();        Decimal total {get;}     }    public class Classregistration:iclassregistration     {public        void Create ()         {            //Create Registration Code         } public        void Transfer ()         {            //class Transfer code         } public        decimal total {get; Private set; }     } public    class Registrationprocessor     {public        decimal processregistration (iclassregistration Registration)         {             registration. Create ();            Return registration. Total;         }     } </span>

I understand the refactoring (C #)