Chart.ascx

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<System.Web.UI.DataVisualization.Charting.Chart>" %>
<%
    Model.Page = this.Page;
    var writer = new HtmlTextWriter(Page.Response.Output);
    Model.RenderControl(writer);
%>

ChartController.cs

public class ChartController: Controller
{
  public ActionResult MyChart()
  {
    var chart = new Chart();
    // Configure chart
    return View(chart);
  }
}

global.asax.cs

protected void Application_Start()
{
  // It's importat that this ignore of any url ending with ChartImg.axd is inserted before any Area route registrations.
  // If you won't use Charts in any Area you can put it in your RegisterRoutes() method. 
  RouteTable.Routes.Ignore("{*pathInfo}", new { pathInfo = @"^.*(ChartImg.axd)$" });
  AreaRegistration.RegisterAllAreas();
  RegisterRoutes(RouteTable.Routes);

  // The rest.. 
}

MyChart.aspx

<% Html.RenderPartial("Chart", Model); %>

web.config.xml

<?xml version="1.0"?>
<configuration>

 <!-- Your stuff -->

 <appSettings>   
   <add key="ChartImageHandler" value="storage=file;timeout=20;" />
 </appSettings>

 <!-- Your stuff -->

 <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
       <!-- Other assemblies -->
        <add assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      </assemblies>
    </compilation>

    <!-- Your stuff -->

    <httpHandlers>
      <!-- Other handlers -->
      <add path="ChartImg.axd" verb="GET,HEAD" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
    </httpHandlers>
 </system.web>

 <!-- Your stuff -->

</configuration>