title: Generate short GUID from GUID c#
body: <p>I need to use something like short guid in url instead of ID.</p>
  
  <p>So, short guid must be 8 characters length and contain only numbers and lower-case alphabet symbols.</p>
  
  <p>I want to add some "security" in urls.</p>
  
  <p>I know it wont't protect from hackers but I don't want to use IDs because user can look at info for every ID.</p>
  
  <p>With short guid it will be more difficult to choose identifier to particular entity.</p>
  
  <p>For example, I'm going to share link to document that contains some private data of user. And I don't want it "example.com/document/id"</p>
  
  <p>What ways to do that?</p>