title: Find lines inside rectangles (LINQ)
body: <p>I have two lists of lines and rectangles. What I need to do is to remove all lines from the list that are "inside more than one rectangle". I know how to do it using loops. I am looking for an elegant solution using Linq in C#. Is it possible?</p>
  
  <p>I am using Rectangle.HitTest(Line l) to check if the line is inside a rectangle.</p>