private void _Event_AcceptButton_Clicked(object sender, RoutedEventArgs e) { if (Model.Value != null) { ConversationInvitationModel content = Newtonsoft.Json.JsonConvert.DeserializeObject <ConversationInvitationModel>(Model.Value.Content.ToString()); NotificationService.AcceptInvitationJoinConversation(content.ConversationID, Model.Key, content.FromUserID, content.ToUserID); } else { MessageBox.Show("Error"); } }