用法： TnsParser parser = new TnsParser();
            parser.Parse();
            TnsEntryCollectionType entries = parser.TnsFileEntries;
            for (int i = 0; i < entries.Count; i++)
            {
                 MessageBox.Show(entries[ i ].Server);
                 MessageBox.Show(entries[ i ].ServiceName);
                 MessageBox.Show(entries[ i ].HostName);
                 MessageBox.Show(entries[ i ].PortNumber);
            }