Can anyone teach me how to convert the listobj to dataset?

Code:
  ROLES_FORMSEN argEn = new ROLES_FORMSEN();
        ROLES_FORMS dalObj = new ROLES_FORMS();

        List<ROLES_FORMSEN> listObj = dalObj.GetList(argEn);

        GridView1.DataSource = listObj;
       

        GridView1.DataBind();