private static Portfolio ApplyChanges(Portfolio ptf, PortfolioChanges changes)
{
ptf.Location = changes.Location;
ptf.Name = changes.Name;
ptf.Balance = changes.Balance;
return(ptf);
}
public Portfolio CreatePortfolio(PortfolioChanges newValues)
{
var newPtf = ApplyChanges(CreatePortfolio(portfolios.Keys.Max() + 1), newValues);
portfolios[newPtf.Id] = newPtf;
return(newPtf);
}
public void UpdatePortfolio(int id, PortfolioChanges changes)
{
portfolios[id] = ApplyChanges(portfolios[id], changes);
}