title: How to access C# class from Javascript
body: <p>I have a class named <code>book</code> in C#. In an ASPX page (which has access to <code>book</code> class), I have an <code>iframe</code> element. I want to use Javascript from the page in the <code>iframe</code>, to call <code>book.write()</code>, but I'm not sure if I can call a C# method from a page inside an <code>iframe</code> using Javascript.</p>
  
  <p>How I can do that?</p>