private void ExecutedAdd(object sender, ExecutedRoutedEventArgs e)
 {
     InnerPortfolios.Add(SelectedAllPortfolio);
     _portfolio.Weights.Add(SelectedAllPortfolio, 1);
 }
 private void ExecutedAdd(object sender, ExecutedRoutedEventArgs e)
 {
     InnerPortfolios.Add(new KeyValuePair <Portfolio, decimal>(ComboBoxAllPortfolios.SelectedPortfolio, (decimal)PortfolioWeight.Value));
 }