[][正则表达式]正则表达式的有关问题

 string tempStr = File.ReadAllText(@"C:\Users\M\Desktop\Test.txt", Encoding.GetEncoding("GB2312"));            string pattern = @"(-+?)[^-]+?\1[^-]*(?=\s|$)";                    foreach (Match m in Regex.Matches(tempStr, pattern))            {                string result = m.Value;//循环输出                            }