For a large fillin form I use the asp.net FormView for the magic databinding to my model. In this model I've a property called Rides (shown below), which exposes a list, which I obviously not want to be replaced entirely. So I made it readonly.

However, this way I can't use the databinding features anymore. Is there a common solution for this problem?

public IList<Ride> Rides
{
    get
    {
        if (this._rides == null)
        {
            this._rides = new List<Ride>();
        }

        return this._rides;
    }
}