字符串的处理问题

Question

string[] RexStr = new string[3] { "\\$pagetitle\\$", "\\$keywords\\$", "\\$description\\$" };
string[] RtnStr = new string[3] { "Title", "Keyword", "Description" };


for (int k = 0; k < RexStr.Length; k++)
{
  Regex MyRegex1 = new Regex(RexStr[k], RegexOptions.IgnoreCase);
  if (MyRegex1.IsMatch(GetHtml))
  {
  GetHtml = MyRegex1.Replace(GetHtml.ToString(), model.RtnStr[k].ToString());
  }
}

错误 2 “jm.Model.News”并不包含“RtnStr”的定义

如何才能使RtnStr[k]成为一个整体，调用model.Title,model.keyword，model.Description的值