使用字典的C#词频

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string text = "This is a sample text. It contains multiple words and multiple occurrences of some words.";

        // 将文本拆分为单词数组
        string[] words = text.Split(new char[] { ' ', '.', ',', '!', '?' }, StringSplitOptions.RemoveEmptyEntries);

        // 创建字典来存储单词和出现次数
        Dictionary<string, int> wordFrequency = new Dictionary<string, int>();

        // 遍历单词数组并统计词频
        foreach (string word in words)
        {
            if (wordFrequency.ContainsKey(word))
            {
                // 单词已存在，增加出现次数
                wordFrequency[word]++;
            }
            else
            {
                // 单词不存在，添加到字典并设置初始出现次数为1
                wordFrequency.Add(word, 1);
            }
        }

        // 输出每个单词及其出现次数
        foreach (KeyValuePair<string, int> entry in wordFrequency)
        {
            Console.WriteLine("单词: {0}, 出现次数: {1}", entry.Key, entry.Value);
        }
    }
}