I'm using the ContentService but am not sure where I can hook in to update a property value and have it save.. I'm doing the following:

public class RegisterCustomEvents : ApplicationEventHandler
    {
        protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {

            base.ApplicationStarted(umbracoApplication, applicationContext);
            ContentService.Saving += ContentService_Saving;
        }

        void ContentService_Saving(IContentService sender, Umbraco.Core.Events.SaveEventArgs<IContent> e)
        {
            GeolocateStockists(sender, e.SavedEntities);
        }

        void GeolocateStockists(IContentService contentService, IEnumerable<IContent> savedEntities)
        {
            if (savedEntities != null)
            {
                var stockists = savedEntities.Where(s => s.ContentType.Alias == StockistDocTypeAlias);
                if (stockists.Any())
                {
                    foreach (var stockist in stockists)
                    {
                        var addressProperty = stockist.Properties[StockistAddressPropertyName];
                        var address = addressProperty != null ? addressProperty.Value.ToString() : "";

                        if (!string.IsNullOrWhiteSpace(address))
                        {
                            var geoResult = GoogleGeoCoder.GetLocationFromGoogleMaps(address);

                            if (geoResult.Results.Any())
                            {
                                stockist.SetValue(StockistLatLongPropertyName, geoResult.Results[0].Geometry.Location.Lat.ToString(Utility.NumberFormatInfo) + "," + geoResult.Results[0].Geometry.Location.Lng.ToString(Utility.NumberFormatInfo) + ",13");
                            }
                        }
                    }
                }
            }
        }

        const string StockistDocTypeAlias = "Stockist";
        const string StockistAddressPropertyName = "stockistAddress";
        const string StockistLatLongPropertyName = "latLong";
    }

Unfortunately the new value isn't saved to the content item. Just wondering what I'm missing

I tried caling contentService.Save(stockist) without success after the call to SetValue

Thanks,

Tom