Associate workflow programmatically

SPWorkflowTemplate baseTemplateWF = web.WorkflowTemplates["261d83b2-01f5-4dec-9a68-fbd85f5aaf24"];
//In Workflow-> Element.xml -> <Workflow  -> Id
SPWorkflowAssociation assocList =SPWorkflowAssociation.CreateListAssociation(baseTemplateWF, "instance name", taskList, historyList);
//taskList: list ok task
//historyList: workflow list history 
assocList.AutoStartCreate = true; // Auto start when new item added
list.WorkflowAssociations.Add(assocList);