public class Heatmap : Series, WinRT.IWinRTObject  

var hmap = new Heatmap();
hmap.ItemsSource = new double [,] { { 0, 0.5 }, {0.5, 1 }, { 1, 0.4 }, { 0.5, 1 } };
hmap.ColorScale = new GradientColorScale() { Min = 0, Max = 1, Colors = new List<Color> { Color.White, Color.Red } };
chart.Series.Add(hmap);
chart.AxisX.ItemsSource = new string[] {"Q1", "Q2", "Q3", "Q4" };
chart.AxisY.ItemsSource = new string[] { "Region 1", "Region 2" };