WpfWatermarkTextBox.Behaviors.WatermarkComboBoxBehavior.WatermarkComboBoxBehavior C# (CSharp) Метод

        private WatermarkComboBoxBehavior(ComboBox comboBox)
        {
            if (comboBox == null)
                throw new ArgumentNullException("comboBox");

            m_ComboBox = comboBox;
        }