title: number of elements in Tuple<...>
body: <p>Just wondering if there's an easy way to know how many elements are contained in a Tuple class</p>
  
  <p>eg.</p>
  
  <pre><code> var a = new Tuple&lt;int,int&gt;(1,2);
  </code></pre>
  
  <p>but how many elements are there?  Perhaps we don't care if we try to cast via the as keyword</p>
  
  <pre><code> var a1 = a as Tuple&lt;int&gt;
   if(a1!=null)
  
   var a2 = a as Tuple&lt;int,int&gt;
   if(a2!=null)
  </code></pre>
  
  <p>Just after a little feedback.  Are many people using Tuple?</p>