async Task<SalesByCategory> GetDataAsync ()
		{
			var salesByCategory = await client.For("Sales_by_Categories")
				.Top (15).OrderBy ("ProductSales").FindEntriesAsync ();
	
			var saleByCtg = new SalesByCategory ();
			foreach (var sale in salesByCategory) {
				saleByCtg.ProductName.Add (NSObject.FromObject (sale ["ProductName"].ToString ()));
				saleByCtg.ProductSales.Add (NSObject.FromObject (sale ["ProductSales"].ToString ()));
			}

			return saleByCtg;
		}
        async Task <SalesByCategory> GetDataAsync()
        {
            var salesByCategory = await client.For("Sales_by_Categories")
                                  .Top(15).OrderBy("ProductSales").FindEntriesAsync();

            var saleByCtg = new SalesByCategory();

            foreach (var sale in salesByCategory)
            {
                saleByCtg.ProductName.Add(NSObject.FromObject(sale ["ProductName"].ToString()));
                saleByCtg.ProductSales.Add(NSObject.FromObject(sale ["ProductSales"].ToString()));
            }

            return(saleByCtg);
        }