大神请进来指教指教。.net C# .txt的读取

Question

textboxC#.net.txt

Answer 1

           StreamReader sr = new StreamReader("test.txt");
            string line;
            while ((line = sr.ReadLine())!= null)
            {
                if (line.IndexOf("span") != -1)
                {
                    string s = line.Split('>')[1];
                    s = s.Split('<')[0];
                    textBox.text = s;
                    break;
                }
            }

Answer 2

        static void Main(string[] args)
        {
            string txt = File.ReadAllText("test.txt",Encoding.Default);
            string reg = @"<span>(.+?)</span>";
            MatchCollection mc = Regex.Matches(txt, reg);
            StringBuilder sb = new StringBuilder();
            foreach (Match item in mc)
            {
                sb.Append(item.Groups[1]);   
            }
            Console.WriteLine(sb.ToString());
            Console.ReadKey();
        }
正则表达式更好一些