title: How to check if an IP address is within a particular subnet
body: <p>I have a subnet in the format 10.132.0.0/20 and an IP address from the ASP.Net request object.</p>
  
  <p>Is there a .NET framework function to check to see if the IP address is within the given subnet?</p>
  
  <p>If not, how can it be done? Bit manipulation, I guess?</p>