title: pass IDictionary<,> as a parameter in attribute, possible?
body: <p>is it possible to pass an IDictionary as an attribute's parameter:
  like this:</p>
  
  <pre><code>[My(new Dictionary&lt;string,object&gt; { ... }]
  </code></pre>
  
  <p>or like this:</p>
  
  <pre><code>[My(Data = new Dictionary&lt;string,object&gt; {...} )]
  </code></pre>
  
  <p>atm I'm thinking to just pass a json string and after transform it into <code>IDictionary&lt;string,object&gt;</code></p>