public NewPortfolio(CurrencyExchanger ce)
        {
            InitializeComponent();

            this.Icon = Properties.Resources.Stocks;

            comboBox1.DataSource = ce.GetCurrenciesRetrieved();
        }
        public PortfolioUI(ref Portfolio portfolio, ref CurrencyExchanger ce)
        {
            InitializeComponent();

            this.Icon = Properties.Resources.Stocks;

            this.thisPortfolio = portfolio;

            UpdateGraph();

            updateGrid(thisPortfolio);

            tbName.Text = thisPortfolio.Name;

            cbCurrency.DataSource = ce.GetCurrenciesRetrieved();

            cbCurrency.SelectedItem = thisPortfolio.PreferredCurrency;
        }