Convert MonthName to MonthNo and vice versa

enum Months:byte
    {
        Jan = 1, Feb, March, April,
        May, June, July, August, Sept, Oct, Nov, Dec
    };
 
    public string MonthName(int month)
    {
        return Enum.GetName(typeof(Months), month);
    }
 
    public byte monthNo(string monthName)
    {
        byte monthno=0;
        foreach (byte Mno in Enum.GetValues(typeof(Months)))
        {
            if (Enum.GetName(typeof(Months), Mno) == monthName)
            {
                monthno = Mno;
                break;
 
            }
 
        }
        return monthno;
    }
 
And call these method here
Response.Write("Month Name:" + MonthName(12));
Response.Write("Month No:" + monthNo("Dec").ToString());

DateTime.ParseExact("December", "MMMM", CultureInfo.CurrentCulture).Month.ToString();
//return 12
CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(12).ToString();
//return December