Forms Data Controls :: Adding Any Control Causes Web.config Failure

Feb 24, 2010

I have a brand new VS 2008 website using 3.5 frame. Default page works but if I add a chart or Gridview I get: Parser Error Message: Could not load file or assembly 'System.Web.DataVisualization, Version=3.5.0.0
in the Web.Config file the <add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:TempImageFiles];" />

I am hosting on our own fully managed server - why the DataVisualization assembly is not being found. Also I was able to load the Default.aspx page until I tried to add a GridView to it. Now it too generates the assembly error eventhough I deleted it. If I comment out the DataVisualization assembly the default and test pages load - there are no controls on these pages. Ony text. Very confused. This is my first attempt at using VS 2008, I am using the trial version.

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