จะให้String 12-345 มัน +1 มีตัดคำหรืออะไรที่ทำให้ +1 ไหมครับ

            
            string tempStr = "12-1213";

            //this statement return > "12-1214"
            string resultStr = tempStr.Split(new char[] { '-' }
                , StringSplitOptions.RemoveEmptyEntries)
                    .ToArray()
                    .Aggregate((current, next) => current + "-" + (Int32.Parse(next) + 1).ToString());

            //and this yield > "13-1214"
            string OtherResultStr = Array.ConvertAll(tempStr.Split(new char[] { '-' }
                , StringSplitOptions.RemoveEmptyEntries)
                    .ToArray()
                , s => (Int32.Parse(s) + 1).ToString())
                    .ToArray()
                    .Aggregate((current, next) => current + "-" + next);