title: What is the error in this code? Interview
body: <p>In a recent interview I had this question.</p>
  
  <p>Whats the error here?  I know enough c# but I cant see an error. Can you?</p>
  
  <pre><code>Class x {
       protected string t1;
       public int t2;
  }
  Class y : x {
  }
  </code></pre>