Need help with XML editing in C#

public String GetSetting(String Name, String File_Name)
        {
            string Temp = "";
            if (File.Exists(File_Name))
            {
                string sName = "";
                XmlTextReader reader = new XmlTextReader(File_Name);
                while (reader.Read())
                {
                    switch (reader.NodeType)
                    {
                        case XmlNodeType.Element:
                            sName = reader.Name;
                            break;
                        case XmlNodeType.Text:
                            if (sName == Name)
                            {
                                Temp = reader.Value;
                            }
                            break;
                    }
                }
                reader.Close();
            }
            else
            {
                //Error(File_Name + " was not found");
            }
            return Temp;
        }

Zeron.XML zXML = new Zeron.XML();
zXML.GetSetting("ServerRoot",sFile);