# Appointment Factory

**RadScheduler** uses an **AppointmentFactory** to create **IEvent** objects which represent the appointments. It implements the **IAppointmentFactory** interface which requires only the **CreateNewAppointment** method's implementation.

This factory is very useful when you need to use a custom Appointment class. Just override the **CreateNewAppointment** method and run a new instance of your custom class:

```C#
    
public class CustomAppointmentFactory : IAppointmentFactory
{
    public IEvent CreateNewAppointment()
    {
        return new AppointmentWithEmail();
    }
}

```

```VB.NET
Public Class CustomAppointmentFactory
Implements IAppointmentFactory
    Public Function CreateNewAppointment() As IEvent Implements IAppointmentFactory.CreateNewAppointment
        Return New AppointmentWithEmail()
    End Function
End Class

```

Then, you need to apply this factory to your **RadScheduler**:

```C#
this.radScheduler1.AppointmentFactory = new CustomAppointmentFactory();

```

```VB.NET
Me.RadScheduler1.AppointmentFactory = New CustomAppointmentFactory()
```

Now, if you double click a **SchedulerCellElement** or create a new appointment via the context menu, the custom class for appointments will be used.

## See Also

* [Adding a Custom Field to the EditAppointment Dialog](https://www.telerik.com/products/winforms/documentation/controls/scheduler/appointments-and-dialogs/adding-a-custom-field-to-the-editappointment-dialog)