SharePoint Workflow Association to SharePoint List

The below code is used to associate the workflow to the list as well as the update the workflow association to the sharepoint list

 // Add workflow association to my list
                        if (hasWorkflowAssociation == null)
                        {
                            sharePointSitesList.WorkflowAssociations.Add(workflowAssociation);
                            // Enable workflow
                            workflowAssociation.Enabled = true;
                        }
                        else
                        {
                            hasWorkflowAssociation.Enabled = true;
                            sharePointSitesList.UpdateWorkflowAssociation(hasWorkflowAssociation);
                            sharePointSitesList.Update();
                        }