Testability

Isop does not get in your way

No need for inheritance

Register your dependency injection framework or object factory

Write code without Console.WriteLine

Isop will interpret an ienumerable result as what the developer intends to display

public class CustomerController
{
    public CustomerController(ICustomerService svc)
    { //...
    }
    public IEnumerable<string> Add(string name)
    {
        yield return "Starting to add customer "+name;
        var c = store.CreateCustomerWithName(name);
        yield return "Setting up default preferences";
        svc.SetupDefaultPreferenses(c);
        yield return "Generating random password";
        svc.GenerateRandomPassword(c);
        yield return "Saving user to database";
        c.Commit();
    }
}

Accept file parameters