list = testString.Split(',').ToList();//把testString用","进行拆分，拆分结果为一个列表List<String>
bool b= testString.Contains("\r\n");//判断testString是否包含\r\n
string resString = testString.Replace("\r\n","").Trim();//将testString字符串中的"\r\n"替换为空，替换之后的字符串为resString
