public UpdateForm(ProductsDto dto)
        {
            _dto = dto;

            InitializeComponent();

            this.tbProductName.Text = _dto.Name;

            var op     = new getSuppliersOperation();
            var supDto = OperationManager.Instance.ExecuteOperation(op).Data as IEnumerable <SupplierDto>;

            PopulateComboBoxes(this.cbSupplier, supDto);
            this.cbSupplier.SelectedValue = _dto.SupplierId;
        }
        private IEnumerable <SupplierDto> GetSuppliers()
        {
            var supOp = new getSuppliersOperation();

            return(OperationManager.Instance.ExecuteOperation(supOp).Data as IEnumerable <SupplierDto>);
        }