String.Replace

여러건을 한번에 치환하기

Dictionary<string, string> dic = new Dictionary<string, string>() {
    {"<!--rows-->", "rows chnaged to new value"}
};

Console.WriteLine(
    dic.Aggregate (
        "old <!--rows--> change", 
        (current, item) => current.Replace (item.Key, item.Value)
    )
);