Auto-updating Entity

gistfile1.cs

public class CustomerAddress
{
    public event DomainEvent NotifyObservers;        

    string _name;
    public string Name
    {
        get { return _name; }
        set
        {
            _name = value;
            NotifyObservers(new CustomerAddressChanged(this));
        }
    }

    public string Address { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string Zip { get; set; }        
}

public class CustomerAddressChanged
{
    public readonly CustomerAddress CustomerAddress;

    public CustomerAddressChanged(CustomerAddress customerAddress)
    {
        CustomerAddress = customerAddress;
    }
}