private OperationResult ShowSharingSheet(ISharingContent content)
        {
            var dialog = new ShareDialog();

            dialog.FromViewController = NavigationHelper.GetActiveViewController();
            dialog.SetShareContent(content);
            dialog.Mode = ShareDialogMode.ShareSheet;
            bool success = dialog.Show();

            if (success)
            {
                return(OperationResult.AsSuccess());
            }
            else
            {
                return(OperationResult.AsFailure("Could not display Facebook sharing sheet"));
            }
        }