Here Mudassar Ahmed Khan has explained with an example, how to dynamically populate ASP.Net Chart control- Pie Chart from SQL Server Database on the SelectedIndexChanged event of ASP.Net DropDownList control.

Thus the chart control populates the charts based in the DropDownList selection.

Here Mudassar Ahmed Khan has explained how to make use of the new feature Parallelism in .Net 4.0 making use of the new classes Parallel and PLINQ (Parallel LINQ)