如何修复C#代码中额外空格问题？

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string input = "Hello     World!    ";
        string pattern = @"\s+";
        string replacement = " ";
        string result = Regex.Replace(input, pattern, replacement);
        Console.WriteLine(result); // Output: Hello World!
    }
}

using System;

class Program
{
    static void Main()
    {
        string input = "Hello     World!    ";
        string[] words = input.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
        string result = string.Join(" ", words);
        Console.WriteLine(result); // Output: Hello World!
    }
}