private void btnCallService_Click(object sender, EventArgs e)
{
///------------------------------------------------------------<endpoint name="TradingServiceConfiguration"
ITradingService dealProxy = new ChannelFactory <ITradingService>("TradingServiceConfiguration").CreateChannel();
dealProxy.BeginDeal();
Trade trade = new Trade();
trade.Count = 10;
trade.Symbol = "MSFT";
trade.Date = DateTime.Now.AddMonths(2);
dealProxy.AddTrade(trade);
dealProxy.AddFunction("InterestRateEstimation");
dealProxy.AddFunction("TechnologyStockEstimation");
decimal dealValue = dealProxy.Calculate();
textBox1.Text = "Deal value estimated at ${0}" + dealValue;
dealProxy.Purchase();
dealProxy.EndDeal();
((IChannel)dealProxy).Close();
}