Lost .netcharting functionality after changing project from .NET 4 to 3.5

I have a project that uses the asp chart control. The project was developed to use .net 4.0 but the server uses version 3.5. I changed the project to 3.5 but now my charts don't work. When I change it it tells 开发者_如何学运维me that system.web.DataVisualisation.dll will be removed.

I guess I am looking for a fix which will add this assembly back?

any help most appreciated!

Jonesy

Can you just not add the reference again? (After you deploy the .dll again)

Edit: manual alteration of web.config may be needed. Look for: System.Web.DataVisualization, Version=4.0.0.0.