C# -如何将“text text 542050 text text”转换为“text text 542050.0000 text text”？

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string input = "text text 542050 text text";
        string pattern = @"\b(\d+)\b"; // 匹配一个或多个数字的单词

        string output = Regex.Replace(input, pattern, match =>
        {
            int number = int.Parse(match.Value);
            return number.ToString("F4"); // 将数字格式化为带有4位小数的字符串
        });

        Console.WriteLine(output);
    }
}