提取C＃中两个标签之间的文本

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main(string[] args)
    {
        string input =<start>这是一段文本<end>";
        string pattern =<start>(.*?)<end>";
        Regex regex = new Regex(pattern);
        Match match = regex.Match(input);
        if (match.Success)
        {
            string result = match.Groups[1].Value;
            Console.WriteLine(result);
        }
    }
}