title: Creating new object without passing parameter
body: <p>I'm reading <strong>Data Structures and Algorithms Using C#</strong> (Michael McMillan).</p>
  
  <p>In <strong>chapter 3 Page 43</strong>, I found code snippet that take parameter in constructor but creating object without passing anything.</p>
  
  <p><img src="https://i.stack.imgur.com/7Gj2A.png" alt="enter image description here"></p>
  
  <p>Is that possible?</p>