public DashboardModel() { Regions = new List <Monthly>(); Categories = new List <Monthly>(); Agents = new List <Monthly>(); Sales = new Dictionary <Months, double>(); Top5 = new List <Product>(); Hots = new List <Burning>(); Invoices = new List <Invoice>(); Customers = new List <Customer>(); foreach (Months mon in Months.GetValues(typeof(Months))) { Sales[mon] = 0; } }