split分割字符串

string[] tmp = weekcode.Split(new char[] { '_' });
            string yr = tmp[0];
            string wk = tmp[1];

string[] tmp = Regex.Split(eachL, "error", RegexOptions.IgnoreCase);       //用字符串来分割("error")把 以"error"为分割点

string[] tmp = Regex.Split(eachLine, "ERROR",RegexOptions.IgnoreCase);    //RegexOptions.IgnoreCase 不区分大小写