asp.net master property string, how to check in content page if string is empty
<p>if i have a master property string for example:</p>

<pre><code>public String SharedInfo
{
    get { return (String)Session["SharedInfo"]; }
    set { Session["SharedInfo"] = value; }
}
</code></pre>

<p>and a label in an content page, i check if the string is empty by doing:
if(Master.SharedInfo == null)</p>

<p>now my question is: why does if(Master.SharedInfo == "") not work, because the SharedInfo is a string right?</p>
