Write below code:-
public string GetMonthName(int MonthNumber)
{
if (MonthNumber < 1 || MonthNumber > 12)
return string.Empty;
string[] Months = { "January", "February", "March", "April", "May", "June", "July", "August", "September",
"October", "November", "December" };
return Months[MonthNumber - 1];
}
Now,to test above function:-
Response.Write(GetMonthName(1));
Response.Write("<br/>");
Response.Write(GetMonthName(2));
Response.Write("<br/>");
Response.Write(GetMonthName(5));
Response.Write("<br/>");
Response.Write(GetMonthName(7));
Response.Write("<br/>");
Response.Write(GetMonthName(12));
Response.Write("<br/>");
Output:-
January
February
May
July
December