title: Create a polygon around a polyline like a buffer
body: <p>I have looked around to find an example of how to take a polyline and create a buffer around it so I end up with a polygon.</p>
  
  <p>So far I found out I need Minkowskis Sums to do so, but I can't get my head around to raw algorithm and translate that in to code. </p>
  
  <p>I would prefer an example in C# or a walkthrough of the algorithm. </p>