 <p>I got a slightly messier answer by first converting your dynamic array to a known type:</p> <pre><code>IEnumerable&lt;JToken&gt; d2 = d.array; </code></pre> <p>Then you can use Any as an extension method.</p> <pre><code>if (d2.Any(p =&gt; p.ToString() == "1")) //etc. </code></pre>