title: Adding an IList item to a particular index number
body: <p>Our Client's database returns a set of prices in an array, but they sometimes don't include all prices, i.e., they have missing elements in their array.  We return what we find as an IList, which works great when we retrieve content from the database.  However, we are having difficulties setting the elements in the proper position in the array.</p>
  
  <p>Is it possible to create an IList then add an element at a particular position in the IList?</p>
  
  <pre><code>var myList = new List&lt;Model&gt;();
  var myModel = new Model();
  myList[3] = myModel;  // Something like what we would want to do
  </code></pre>