DateTime d1 = new DateTime(2016, 4, 1, 0, 0, 0);

                DateTime d2 = new DateTime(2017, 3, 31, 0, 0, 0);

                int yearTick = 0;

                while (d1.AddYears(yearTick) <= d2)

                {

                    if (d1.AddYears(yearTick + 1) > d2)

                        break;

                    yearTick++;

                }

                int monthTick = 0;

                while (d1.AddMonths(monthTick) <= d2)

                {

                    if (d1.AddMonths(monthTick + 1) > d2)

                        break;

                    monthTick++;

                }

                int month = yearTick > 0 ? monthTick % (yearTick * 12) : monthTick;

                DateTime d3 = d1.AddYears(yearTick).AddMonths(month);

                TimeSpan ts = d2.Subtract(d3);

                lblMsg.Text = yearTick + "年" + month + "月" + ts.Days + "天" + ts.Hours + "时" + ts.Minutes + "分" + ts.Seconds + "秒";