public static IEnumerable <DistrictPreciseView> Merge(IEnumerable <TownPreciseView> townPreciseViews)
{
var preciseViews = townPreciseViews as TownPreciseView[] ?? townPreciseViews.ToArray();
if (!preciseViews.Any())
{
return(null);
}
var districts = preciseViews.Select(x => x.District).Distinct();
var city = preciseViews.ElementAt(0).City;
return(districts.Select(district =>
{
var view =
DistrictPreciseView.ConstructView(preciseViews.Where(x => x.District == district).ArraySum());
view.City = city;
view.District = district;
return view;
}).ToList());
}
