title: Plotting 2D heat map
body: <p>I have a chart on which I want to plot a heat map; the only data I have is humidity and temperature,  which represent a point in the chart. </p>
  
  <p>How do I get the rectangular type of heat map on the chart in c#?</p>
  
  <p>What I want is similar to picture below : </p>
  
  <p><a href="https://i.stack.imgur.com/qlpxD.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/qlpxD.jpg" alt="enter image description here"></a></p>
  
  <p>What I really want is a rectangular region in the chart which is plotted in different color based on the point that i get from the list of points and form the colorful section in the chart.</p>