Convert Java code to C#
<p>Please help convert the following Java code to C# ?</p>

<pre><code>String[] titles = new String[] { "Alpha", "Beta", "Gamma", "Delta" };
List&lt;double[]&gt; x = new ArrayList&lt;double[]&gt;();
for (int i = 0; i &lt; titles.length; i++) {
 x.add(new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,13,14,15 });
 }
</code></pre>

<p>And what is this code doing?  </p>

<p>Thanks</p>
