Calculate current financial year

Calculate current financial year in C#

        public static string GetCurrentFinancialYear()
        {
            int CurrentYear = DateTime.Today.Year;
            int PreviousYear = DateTime.Today.Year - 1;
            int NextYear = DateTime.Today.Year + 1;
            string PreYear = PreviousYear.ToString();
            string NexYear = NextYear.ToString();
            string CurYear = CurrentYear.ToString();
            string FinYear = null;

            if (DateTime.Today.Month > 3)
                FinYear = CurYear + "-" + NexYear;
            else
                FinYear = PreYear + "-" + CurYear;
            return FinYear.Trim();
        }