Microsoft Chart Controls Add-on for Microsoft Visual Studio 2008
If you have worked with Microsoft Charting Controls, you know, after installing this package, Visual Studio don't add components to toolbox an you should do it manually.
but there is a small Add-on that after installing, you can take advantage of Visual Studio toolbox integration and IntelliSense for the ASP.NET and Windows Forms Chart controls.
Note that you should install Add-on after installing Microsoft Charting Controls.
Download this Add-on from here