public void OpenFolder(MailFolders folder)
        {
            switch (folder)
            {
            case MailFolders.Sent:
                ListMailPage = MailPage.OpenSentFolder();
                break;

            case MailFolders.Drafts:
                ListMailPage = MailPage.OpenDraftsFolder();
                break;

            default:
                throw new NotImplementedException($"Click on {folder} folder is not implemented");
            }
        }