public ChartBase GetCustomersListingsCount()
        {
            var query = _dashboardRepo.GetIqueryableCustomers();

            var CustomersWithListings    = query.Count(i => i.Listings.Count > 0);
            var CustomersWithoutListings = query.Count(i => i.Listings.Count == 0);

            ChartBase chart = new PieChart();

            chart.Data = new DataModel
            {
                Labels = new List <string> {
                    "Customers with listings",
                    "Customers without listings"
                },
                Datasets = new List <DataSetModel> {
                    new DataSetModel
                    {
                        Data = new List <int> {
                            CustomersWithListings, CustomersWithoutListings
                        }
                    }
                }
            };

            return(chart);
        }