包含特殊字符的C#单词排列

using System;
using System.Collections.Generic;

public class WordPermutation
{
    public static List<string> GetPermutations(string word)
    {
        List<string> permutations = new List<string>();
        Permute(word.ToCharArray(), 0, permutations);
        return permutations;
    }

    private static void Permute(char[] word, int index, List<string> permutations)
    {
        if (index == word.Length - 1)
        {
            permutations.Add(new string(word));
            return;
        }

        for (int i = index; i < word.Length; i++)
        {
            if (IsSpecialCharacter(word[i]))
                continue;

            Swap(ref word[index], ref word[i]);
            Permute(word, index + 1, permutations);
            Swap(ref word[index], ref word[i]);
        }
    }

    private static bool IsSpecialCharacter(char c)
    {
        // Define your own logic to determine if a character is special
        // For example, you can check if it is a punctuation mark or a whitespace
        return !char.IsLetterOrDigit(c);
    }

    private static void Swap(ref char a, ref char b)
    {
        char temp = a;
        a = b;
        b = temp;
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        string word = "C#排列";
        List<string> permutations = WordPermutation.GetPermutations(word);
        foreach (string permutation in permutations)
        {
            Console.WriteLine(permutation);
        }
    }
}