public Task SaveTraderAsync(Trader trader)
{
var items = Traders.Where(x => x.Identifier == trader.Identifier).ToList();
if (items.Count > 0)
{
foreach (var item in items)
{
Traders.Remove(item);
}
Traders.Add(trader);
}
else
{
Traders.Add(trader);
}
return(Task.FromResult(true));
}
public void Add(Trader trader) => Traders.Add(trader);