The name 'string' does not exist in the current context error c#
<p>Here is the code I am currently having the issue with:</p>

<pre><code>        try

        {
            int realopid = Convert.ToInt16(operatorid);
        }
        catch (OverflowException)
        {
            //Create Message Box
            MessageBox.Show("Please Scan Valid Operator ID", "Operator ID");
            operatorid = Microsoft.VisualBasic.Interaction.InputBox("Scan Operator ID", "Operator ID");
        }

            string res = lookupName( realopid );
</code></pre>
