This class contains the options for the dialog being shown.
        public UserPromptWindowViewModel(UserPromptWindow owner, UserPromptWindow.Options options)
        {
            _owner   = owner;
            _options = options;

            ActionCommand = new ProtectedCommand(OnActionCommand);
        }
        public UserPromptWindowViewModel(UserPromptWindow owner, UserPromptWindow.Options options)
        {
            _owner = owner;
            _options = options;

            ActionCommand = new ProtectedCommand(OnActionCommand);
        }