F# how to handle nullable types
<p>I try to do some graphs in F#. As an input I have CSV file that has some values nullable (e.g. nullable int). I try to show chart with following code :</p>

<pre><code>[for row in data.Rows -&gt; row.A.Value, row.B.Value] |&gt; Chart.Point
</code></pre>

<p>Where both A and B are nullable integers. I received following error </p>

<blockquote>
  <p>System.InvalidOperationException: Nullable object must have a value.</p>
</blockquote>

<p>How I should handle nullable types. Should I write some Option type to handle it or there is some other good way how to solve it.</p>