title: How to mock with NSubstitute a method with an array parameter?
body: <p>I have the following interface:</p>
  
  <pre><code>interface IText
  {
      void CopyTo(char[] array, int index);
  }
  </code></pre>
  
  <p>I would like to create a mock object implementing <code>IText</code> which sets<code>array[index]='f'</code>, <code>array[index+1]='o'</code>, <code>array[index+2]='o'</code> when <code>CopyTo</code> is called.</p>
  
  <p>Is this possible with NSubstitute? If so, how?</p>