title: How to generate URL safe checksum for string in .NET (url shortener)?
body: <p>What's the absolute simplest way to generate a <em>URL safe</em> checksum for a string in .NET? I'll use this checksum as a lookup and it will be part of and URL and therefore needs to be URL safe.</p>
  
  <p>GetHashCode would have been perfekt for me if it only generated the same hash for the same string on <a href="https://stackoverflow.com/questions/2099998/hash-quality-and-stability-of-string-gethashcode-in-net">different version of .NET</a> ... Basically what I need is a url shortener I guess</p>