在C#中使用正则表达式获取单词的精确匹配

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string input = "This is a sample sentence with some words.";

        // 构建正则表达式模式
        string pattern = @"\bword\b";

        // 使用Match方法进行匹配
        Match match = Regex.Match(input, pattern);
        if (match.Success)
        {
            string word = match.Value;
            Console.WriteLine("匹配到的单词：{0}", word);
        }
        else
        {
            Console.WriteLine("未找到匹配的单词。");
        }

        // 使用Matches方法进行匹配
        MatchCollection matches = Regex.Matches(input, pattern);
        if (matches.Count > 0)
        {
            Console.WriteLine("匹配到的单词：");
            foreach (Match m in matches)
            {
                string word = m.Value;
                Console.WriteLine(word);
            }
        }
        else
        {
            Console.WriteLine("未找到匹配的单词。");
        }
    }
}