C# XmlNodeList Extension IsNullOrEmpty Check
<p>I have an extension for IEnumerable collections like this:</p>

<pre><code>public static bool IsNullOrEmpty&lt;T&gt;(this IEnumerable&lt;T&gt; enumerable) {
    return enumerable == null || !enumerable.Any(); 
}
</code></pre>

<p>It works for a lot of collections except for XmlNodeList.
Why is that? XmlNode implements IEnumerable ??</p>

<p>Please help</p>
