public CreateEmployee(EmployeesContainer container) { InitializeComponent(); _employeeContainer = container; List<Position> allPositions = new List<Position>(); foreach (Position position in (Position[])Enum.GetValues(typeof(Position))) { allPositions.Add(position); } positionComboBox.ItemsSource = allPositions; positionComboBox.SelectedIndex = 1; List<ContractType> allContractTypes = new List<ContractType>(); foreach (ContractType type in (ContractType[])Enum.GetValues(typeof(ContractType))) { allContractTypes.Add(type); } contractTypeComboBox.ItemsSource = allContractTypes; contractTypeComboBox.SelectedIndex = 1; }