/// <summary> /// Initializes a new instance of the <see cref="SecurityTypeComboBox"/>. /// </summary> public SecurityTypeComboBox() { EnumType = typeof(SecurityTypes); NullItem = new EnumComboBoxHelper.EnumerationMember { Description = string.Empty, Value = _nullType, }; this.GetItemsSource().Insert(0, NullItem); SelectedType = null; }