Implementing Line/Bar Charts with/without Ajax

Hi All,

I am looking for references to implement Line /Bar Chart in my project and I found  implementation with and w/o Ajax like below:

 <asp:ChartID="Chart1"runat="server">

or

<ajaxToolkit:LineChart ID="LineChart1" runat="server">

I tried an example w/o Ajax and works fine. However, I want to understand which approach should be used and what are the advantages?

Also the other issue is in my AjaxToolkit, I dont see any chart controls like LineChart, PieChart,BarChart.(PS: Ajax is successfuly installed and registered as I am already using ajaxTabContainer and its working fine, so no issues with AjaxToolkit registrtaion)

I tried this:

<ajaxtoolkit:LineChartID="LineChart1"runat="server"></ajaxtoolkit:LineChart>

Warning 1 Element 'LineChart' is not a known element. This can occur if there is a compilation error in the Web site, or the web.config file is missing. D:\WebApp_14Nov\AssessmentSummary.aspx 27 18 D:\WebApp_14Nov\

Error 3 Unknown server tag 'ajaxtoolkit:LineChart'. D:\WebApp_14Nov\AssessmentSummary.aspx 27 

Any inputs will be really helpful!!