Returning null from a get inside of a class
<p>I have the following in my model:</p>

<pre><code>    public string Subject { 
        get { 
            return SubjectReference.GetSubject(SubjectID);
        }
    }
</code></pre>

<p>How can I make this so that if the SubjectID is null then the get call will return null? I think there's a way to do this with the ? operator but can I use this inside of a class for model properties?</p>
