title: C# add chart error DataVisualization.Charting - Visual Studio
body: <p>I'm trying to use Charts to create graphs in Visual Studio 2012. I have .Net 4.0
  But when write this:
        <code>using System.Windows.Forms.DataVisualization.Charting;</code></p>
  
  <p>i get an error:</p>
  
  <p><code>The type or namespace name 'DataVisualization' does not exist in the namespace 'System.Windows.Forms'</code>
  How can i solve this?</p>
  
  <p>Thanks!</p>