title: System.Convert does not contain a definition for "toString"
body: <p>I am trying to convert a value to a string, as far as I can tell, I have to use the method toString, of the class Convert, of the namespace System.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>Compiler Error Message: CS0117: 'System.Convert' does not contain a definition for 'toString'
  
  Source Error:
  
  
  Line 101:                while (r.Read())
  Line 102:                {
  Line 103:                    listbox.Items.Add(new ListItem(Convert.toString(r["first_name"]), Convert.toString(r["first_name"])));
  Line 104:                }
  </code></pre>
  
  <p>What am I doing wrong exactly? I'm new to C# (hence why, if you look at my profile you see like 6-7 questions, all related to C# lately!). It's really making me practice my OOP chops too!</p>