Check out example codes for "month number to text in c#". It will help you in understanding the concepts better.

Code Example 1

//For short month names 
string monthName = new DateTime(2010, 8, 1)
    .ToString("MMM", CultureInfo.InvariantCulture);

//For long/full month names for spanish("es") culture
string fullMonthName = new DateTime(2015, i, 1).ToString("MMMM", CultureInfo.CreateSpecificCulture("es"));

//or
string monthName = CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(8);

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