摘要：
DataTable dtStepX = new DataTable("dtStepX");DataTable dtStepS = new DataTable("dtStepS");//获取两个数据源的并集IEnumerable<DataRow> query = dtStepS.AsEnumerabl 阅读全文
摘要：
string input = "hello WoRlD"; string result = Regex.Replace(input, "world", "csharp", RegexOptions.IgnoreCase); Console.WriteLine(result); // prints " 阅读全文