private void btnSetSite_Click(object sender, RoutedEventArgs e) { if (client != null) { OpenFileDialog ofd = new OpenFileDialog() { DefaultExt = "temsXml", Filter = "TEMS Files (*.temsXml)|*.temsXml|All Files (*.*)|*.*" }; if (ofd.ShowDialog() ?? false) { XDocument doc = XDocument.Load(ofd.FileName); client.SetSite(doc); } } }