用于把英文的周几转换为中文的周几

/// <summary>
    /// 用于把英文的周几转换为中文的周几
    /// </summary>
    /// <param name="ENday"></param>
    /// <returns></returns>
 public static string GeCNWeekDay(string ENday)
 {
        string dayName = string.Empty;
        switch (ENday)
        {
            case "Sunday":
                dayName = "周日";
                break;
            case "Monday" :
　　            dayName = "周一";
　　            break;
            case "Tuesday" :
　　            dayName = "周二";
　　            break;
            case "Wednesday":
              dayName = "周三";
              break;
            case "Thursday":
                dayName = "周四";
                break;
            case "Friday":
                dayName = "周五";
                break;
            case "Saturday":
                dayName = "周六";
                break;
　        default :
　　        dayName = "";
　　        break;
        }
        return dayName;
 }