title: What is this colon in a constructor definition called?
body: <p>When defining a constructor in C#, you can use a colon (as in <a href="https://stackoverflow.com/a/3852893/977472">this example</a>):</p>
  
  <pre><code> public class Custom : OtherClass {
        public Custom(string s) : base(s) { }
   }
  </code></pre>
  
  <p><strong>What is this colon called?</strong>  <sup><sub>(It's awfully hard to read about it without knowing what it's called.)</sup></sub></p>
  
  <p>Note that I'm asking about the colon in the <strong>constructor</strong> definition, not the one showing inheritance in the class definition.</p>