title: C# Variable Name "_" (underscore) only
body: <p>I was just hit with a minor issue in C#, it was just a copy-paste mistake but don't know how C# accept it.</p>
  
  <p>This code gets compiled successfully...HOW </p>
  
  <pre><code>namespace DemoNS
  {
      class DemoClass
      {
          String _ = new String('a', 1);        
      }
  }
  </code></pre>
  
  <p>Is there any default significance of variable named <code>_</code>?</p>