title: What is a mono singleton?
body: <p>A friend of mine was recently asked in a job interview to tell the difference between a standard singleton and a mono singleton. I have never heard the term before and a simple google search does not return any meaningful results. </p>
  
  <p>My friend suggested that it is an object where the constructor is public but all the members are static. This seems a little silly to me as it would simply be a static object that would not require a constructor at all.</p>
  
  <p>Does anyone have a better definition of a mono singleton? Is it something useful versus a standard singleton?</p>