How to change the class of an object dynamically in C#?

Question

Suppose I have a base class named Visitor, and it has 2 subclass Subscriber and NonSubscriber.

At first a visitor is start off from a NonSubscriber, i.e.

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Answer 1

public class User
{
    public Subscription Subscription { get; set; }
    public void HandleSubscription()
    {
        Subscription.Method();
    }
}

public abstract class SubscriptionType
{
  public abstract void Method();
}

public class NoSubscription : SubscriptionType
{
  public override void Method()
  {
    // Do stuff for non subscribers
  }
}

public class ServiceSubscription : SubscriptionType
{
  public override void Method()
  {
    // Do stuff for service subscribers
  }
}

public class Service2Subscription : SubscriptionType
{
  public override void Method()
  {
    // Do stuff for service2 subscribers
  }
}

Think the code explains my answer :)