Auto associate workflow with list programmatically (sharepoint2010)

  private void AssociateWorkflow(SPWeb web)

        {
            SPList assocList = web.Lists["TestWFList"];
            SPList wflHistoryList = web.Lists["Workflow History"];
            SPList wflTaskList = web.Lists["Tasks"];
            SPWorkflowTemplate wflTemplate = web.WorkflowTemplates.GetTemplateByName("TestWF", System.Globalization.CultureInfo.CurrentCulture);

            SPWorkflowAssociation wflAss = SPWorkflowAssociation.CreateListAssociation(wflTemplate, "Custom_Approval_WorkFlow - Workflow11", wflTaskList, wflHistoryList);
           

            wflAss.AutoStartChange = false;

            wflAss.AutoStartCreate = true;

            wflAss.AllowManual = true;

            web.AllowUnsafeUpdates = true;
            
            if (assocList.WorkflowAssociations.GetAssociationByName(wflAss.Name,System.Globalization.CultureInfo.CurrentCulture) == null)
            {
                assocList.WorkflowAssociations.Add(wflAss);
            }
            else
            {
                assocList.WorkflowAssociations.Update(wflAss);
            }

            assocList.Update();

            web.AllowUnsafeUpdates = false;
            
        }

you need to call this code in feature activated event in event receiver.