XML : I want to insert HTML->Bidimenional Array->XML

The code above is reading a page and saving data to an bidimenional array and aftar that i want to send that to a class to save it into an xml.After that i want to read that data to make an interactive currency calculator...

  HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();          HtmlWeb ht = new HtmlWeb();          //XDocument Mydocument = Data.createData();          //MessageBox.Show(Mydocument.ToString());          //Data.SaveData("myfirst.xml");          try          {              doc = ht.Load("http://www.curs.md/curs_valutar_banci");          }            catch           {               MessageBox.Show("Eroare la conectare cu sursa...");              Close();          }          string[] result = new string[50];          string[] banci = new string[] { "bnm", "eneg", "ecb", "exim", "fin", "mobi", "micb", "maib", "proc", "vb" };          string[,] banciforxml=new string[10,15];          for (int i = 0; i < banci.Length; i++)          {              try              {                  HtmlNodeCollection nodes = doc.DocumentNode.SelectNodes("//table/tbody/tr[@class='" + banci[i] + "']/td");                  for (int x = 0; x < 15; x++)                  {                      result[x] = nodes[x].InnerText;                      banciforxml[i,x]=result[x];                        listBox1.Items.Add("Result "+i+":"+x+" -> "+banciforxml[i,x]);                  }              }              catch              {                  string value = banci[i];                  switch (value)                  {                      case "bnm":                          MessageBox.Show("Banca Nationala nu functioneaza!!");                          continue;                      case "eneg":                          MessageBox.Show("Energbank nu functioneaza!!");                          continue;                      case "ecb":                          MessageBox.Show("EuroCreditBank nu functioneaza!!");                          continue;                      case "exim":                          MessageBox.Show("Eximbank nu functioneaza!!");                          continue;                      case "fin":                          MessageBox.Show("FinComBank nu functioneaza!!");                          continue;                      case "mobi":                          MessageBox.Show("Mobiasbanca nu functioneaza!!");                          continue;                      case "micb":                          MessageBox.Show("Moldindconbank nu functioneaza!!");                          continue;                      case "maib":                          MessageBox.Show("Moldova Agroindbank nu functioneaza!!");                          continue;                      case "proc":                          MessageBox.Show("ProCredit Bank nu functioneaza!!");                          continue;                      case "vb":                          MessageBox.Show("Victoriabank nu functioneaza!!");                          continue;                  }                }            }          XDocument myDocument=Data.createData(banciforxml);//<-Here is the problem          listBox1.Items.Add(myDocument);