public LazyLoadDatasByFrezableComboBox(FrezableTextComboBox comboBox, string emptyText, string waitText, string format)
        {
            if (comboBox == null)
            {
                throw new ArgumentNullException(nameof(comboBox));
            }

            _emptyText = emptyText;
            _waitText  = waitText;

            _comboBox        = comboBox;
            _comboBox.Sorted = false;

            _format   = format;
            _isFormat = !string.IsNullOrWhiteSpace(_format);

            _comboBoxClearDatas();
        }
 public LazyLoadDatasByFrezableComboBox(FrezableTextComboBox comboBox, string emptyText, string waitText)
     : this(comboBox, emptyText, waitText, string.Empty)
 {
 }