весь месяц в массиве
var months = new string[12];
for (var month = 1; month <= 12; month++)
{
var firstDay = new DateTime(DateTime.Now.Year, month, 1);
var name = firstDay.ToString("MMMM", CultureInfo.CreateSpecificCulture("en"));
months[month - 1] = name;
}
foreach (var month in months)
{
Console.WriteLine($"-> {month}");
}
PrashantUnity