title: Paint a rectangle over an image and save the new image in C# Webform
body: <p>I want to create some sort of heatmap, i have a template image to use, so, i want to draw/paint a full circle, rectangle over the imagen in a point that i already know.</p>
  
  <p>Like for example from the x:200, y:200 to x:250, y :250, take the base image, paint a full rectangle of some color over it, and save the new image.</p>
  
  <p>What will be the easiest way to do it, or the best approach to solve the problem. I'm using a webform with C# on Visual Studio </p>
  
  <p>Thanks</p>