title: Drawing a circle on an image
body: <p>I have a program for image segmentation in WinForms Application C#, and I have an image loaded in a pictureBox. I need to draw a small circle(or an ellipse, it does not matter) on that image (inside a region of interest, and allowing it to grow outwards until it reaches the desired boundary).</p>
  
  <p>And the question is how can I draw that circle anywhere on that image? (and if it`s possible to draw that circle in a different color, red for example)</p>
  
  <p>Thank you.</p>