public override IMemento <List <Transaction> > Restore(ref List <Transaction> target)
{
Transaction removed = target[index];
IMemento <List <Transaction> > inverse = new RemoveTransactionMemento(index, removed);
target.RemoveAt(index);
return(inverse);
}
public override IMemento <List <Transaction> > Restore(ref List <Transaction> target)
{
int index = target.Count - 1;
IMemento <List <Transaction> > inverse = new RemoveTransactionMemento(index, target[index]);
target.RemoveAt(target.Count - 1);
return(inverse);
}