title: Determine if point intersects 35km radius around another point? Possible in Linq?
body: <p>Assume I have a point at the following location:</p>
  
  <p>Latitude: 47°36′N
  Longitude: 122°19′W</p>
  
  <p>Around the above point, I draw a 35Km radius.  I have another point now or several and I want to see if they fall within the 35Km radius?  How can I do this?  Is it possible with Linq given the coordinates (lat, long) of both points?</p>