/// <summary>
        /// Returns a string expression representing a standardized date- and time value.
        /// </summary>
        /// <param name="value">The <see cref="DateTime"/> value to be formatted.</param>
        /// <param name="pattern">The standardized patterns to apply on <paramref name="value"/>.</param>
        /// <param name="fractionalDecimalPlaces">The amount of fractional decimal places to apply to the string expression.</param>
        /// <returns>Returns a string expression representing a date- and time value.</returns>
        public static string FromDateTime(DateTime value, StandardizedDateTimeFormatPattern pattern, byte fractionalDecimalPlaces)
        {
            switch (pattern)
            {
            case StandardizedDateTimeFormatPattern.Iso8601CompleteDateBasic:
                return(value.ToString("yyyyMMdd", CultureInfo.InvariantCulture));

            case StandardizedDateTimeFormatPattern.Iso8601CompleteDateExtended:
                return(value.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture));

            case StandardizedDateTimeFormatPattern.Iso8601CompleteDateTimeBasic:
                return(value.ToString(string.Format(CultureInfo.InvariantCulture, "yyyyMMddTHHmmss{0}{1}", fractionalDecimalPlaces == 0 ? "" : string.Format(CultureInfo.InvariantCulture, ".{0}", StringUtility.CreateFixedString('f', fractionalDecimalPlaces)), value.Kind == DateTimeKind.Utc ? "Z" : "zz"), CultureInfo.InvariantCulture));

            case StandardizedDateTimeFormatPattern.Iso8601CompleteDateTimeExtended:
                return(value.ToString(string.Format(CultureInfo.InvariantCulture, "yyyy-MM-ddTHH:mm:ss{0}{1}", fractionalDecimalPlaces == 0 ? "" : string.Format(CultureInfo.InvariantCulture, ".{0}", StringUtility.CreateFixedString('f', fractionalDecimalPlaces)), value.Kind == DateTimeKind.Utc ? "Z" : "zz"), CultureInfo.InvariantCulture));

            default:
                throw new ArgumentOutOfRangeException(nameof(pattern));
            }
        }
 /// <summary>
 /// Returns a string expression representing a standardized date- and time value.
 /// </summary>
 /// <param name="value">The <see cref="DateTime"/> value to be formatted.</param>
 /// <param name="pattern">The standardized patterns to apply on <paramref name="value"/>.</param>
 /// <returns>Returns a string expression representing a date- and time value.</returns>
 public static string FromDateTime(DateTime value, StandardizedDateTimeFormatPattern pattern)
 {
     return(FromDateTime(value, pattern, 0));
 }