title: In NUnit, how can I explicitly fail a test
body: <p>For example the code below,</p>
  
  <pre class="lang-cs prettyprint-override"><code>[Test()]
  public void Test( )
  {
     try{
        GetNumber( );
     }
     catch( Exception ex ){
         /* fail here */
     }
  
     ...
  }
  </code></pre>
  
  <p>I want to fail my test when GetNumber method throw an exception.</p>
  
  <p>Please advise.</p>
  
  <p>Many thanks.</p>