or
//for ExpirationMonthDateTime.Now.ToString("MMM");//for Expiration YearDateTime.Now.ToString("yyyy");public CreditCardWindow() { InitializeComponent(); CultureInfo cultureInfo = new CultureInfo("en-US"); DateTimeFormatInfo dateTimeFormatInfo = new DateTimeFormatInfo(); dateTimeFormatInfo.ShortDatePattern = "MMMM"; cultureInfo.DateTimeFormat = dateTimeFormatInfo; dteExpirationMonth.Culture = cultureInfo; string dteMonth = dteExpirationMonth.SelectedValue.ToString(); dteMonth.ToUpper(); CultureInfo cultureInfo2 = new CultureInfo("en-US"); DateTimeFormatInfo dateTimeFormatInfo2 = new DateTimeFormatInfo(); dateTimeFormatInfo2.ShortDatePattern = "yyyy"; cultureInfo2.DateTimeFormat = dateTimeFormatInfo2; dteExpirationYear.Culture = cultureInfo2; }

