What's the easiest way to check that a string is not null, not empty and not = "0000"?
<p>I was using the following:</p>

<pre><code>!string.IsNullOrEmpty(Model.ProductID)
</code></pre>

<p>But now I need to also check that the string is not equal to "0000". What's the most easy way to do this check? </p>
