使用正则表达式与ParseExact处理复杂日期时间字符串

^(Today,)? ([A-Z]{3}) ([a-z]{3}) ([0-9]{2}) ([0-9]{4}) at ([0-9]{2}):([0-9]{2}):([0-9]{2}), (.*)$

public static DateTime ParseExact (string s, string format, IFormatProvider provider);

using System;
using System.Text.RegularExpressions;
using System.Globalization;

public class DateTimeParser
{
    public static void Main(string[] args)
    {
        string imperfectDateTimeString = "Today, Fri May 12 2023 at 07:00:00, we go swimming";

        // 步骤一：定义正则表达式并进行匹配
        // 注意：这里我们只关心日期和时间的部分，即月份、日期、年份、小时、分钟、秒
        // 正则表达式捕获组的索引：
        // Group 3: 月份 (May)
        // Group 4: 日期 (12)
        // Group 5: 年份 (2023)
        // Group 6: 小时 (07)
        // Group 7: 分钟 (00)
        // Group 8: 秒 (00)
        string pattern = @"^(Today,)? ([A-Z]{3}) ([a-z]{3}) ([0-9]{2}) ([0-9]{4}) at ([0-9]{2}):([0-9]{2}):([0-9]{2}), (.*)$";
        Match match = Regex.Match(imperfectDateTimeString, pattern);

        if (match.Success)
        {
            // 步骤二：从匹配结果中提取所需部分并重构字符串
            string month = match.Groups[3].Value; // May
            string day = match.Groups[4].Value;   // 12
            string year = match.Groups[5].Value;  // 2023
            string hour = match.Groups[6].Value;  // 07
            string minute = match.Groups[7].Value; // 00
            string second = match.Groups[8].Value; // 00

            // 构造符合ParseExact格式要求的字符串
            string standardDateTimePart = $"{day} {month} {year} {hour}:{minute}:{second}";
            Console.WriteLine($"Extracted and reconstructed string: {standardDateTimePart}");

            try
            {
                // 使用DateTime.ParseExact进行解析
                DateTime parsedDate = DateTime.ParseExact(
                    standardDateTimePart,
                    "dd MMM yyyy HH:mm:ss",
                    CultureInfo.InvariantCulture
                );
                Console.WriteLine($"Successfully parsed DateTime: {parsedDate}");
            }
            catch (FormatException ex)
            {
                Console.WriteLine($"Error parsing date: {ex.Message}");
            }
        }
        else
        {
            Console.WriteLine("No match found for