title: generate random coordinates with boundaries
body: <p>i want a method to generate random coordinates with boundaries. something like this:</p>
  
  <pre><code>private Coordinate[] Calculate(Coordinate location1, Coordinate location2, Coordinate location3, Coordinate location4)
  
  public class Coordinate
  {
      public double Latitude { set; get; }
      public double Longitude { set; get; }
  }
  </code></pre>
  
  <p>i have no idea how can generates coordinates with specified radios.
  <a href="https://i.stack.imgur.com/OeeaP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OeeaP.png" alt="enter image description here"></a></p>