private void RecalculateCost()
{
if (ProductLines.Count == 0)
{
CustomMessageBox.ShowError("Please, specify at least one product line");
return;
}
double?distance = _addressResolver.GetDistanceTo(_delivery.Destination);
if (distance == null)
{
CustomMessageBox.ShowError("Address is not found");
return;
}
_delivery.RecalculateCostEstimate(distance.Value);
Notify(nameof(CostEstimate));
}