c# 如何让tooltip显示文字换行

在代码中可以,Environment.NewLine
如：

?

public string GetCheckNote(string plantext)

        {

            string checknote = "";

            string sql = "SELECT Checker,CheckNote FROM emsCheckPlanRecordCheck WHERE PlanText=@PlanText  order by lastedited asc";

            SqlParameter[] pars =

                    {

                        new SqlParameter("@PlanText",SqlDbType.NVarChar)

                    };

            pars[0].Value = plantext;

            DataSet set = !CommonWebDataServer.CheckServer() ? GetDataSet(sql, pars, CommonWebDataServer.ChLoginServerStr()) : GetDataSet(sql, pars);

            if (set != null && set.Tables[0].Rows.Count > 0)

            {

                foreach (DataRow row in set.Tables[0].Rows)

                {

                    checknote += row["Checker"].ToString() + "：" + row["CheckNote"].ToString() + Environment.NewLine;

                }

            }

            checknote = !string.IsNullOrEmpty(checknote) && checknote.EndsWith(Environment.NewLine) ? checknote.Substring(0, checknote.Length - 1) : checknote;

            return checknote;

        }