匹配字串 公交2路_上_100.gif 怎么提取由2个下划线分割的3部分

            string test = "公交2路_上_100.gif";            string[] result = test.Split(new char[] { '_' });            foreach (string s in result)            {                richTextBox2.Text += s + "\n";            }
------解决方案--------------------
string.Split('_')
------解决方案--------------------
YourStr.Split(new char[] { '_' });