public async Task UpdateQuote (Quote quote)
        {
            await Task.Delay (TimeSpan.FromSeconds (2));

            if (quote.Id == 0)
            {
                quote.Id = _quotes.Count + 1;
                _quotes.Add(quote);
            }
            else
            {
                var oldQuote = _quotes.Find(c => c.Id == quote.Id);
                oldQuote.CustomerName = quote.CustomerName;
                oldQuote.Total = quote.Total;
            }
        }
 public override void Init (object initData)
 {			
     Quote = initData as Quote;
     if (Quote == null)
         Quote = new Quote ();
 }