为什么我的ChannelFactory没有看到我的端点配置？

var configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var section = (ChannelFactoryConfigurationElementCollection)configuration.GetSection("system.serviceModel/client");

var endpointAddress = new EndpointAddress(endpointConfiguration.Address);
var binding = endpointConfiguration.Binding;
var contract = endpointConfiguration.Contract;
var channelFactory = new ChannelFactory<T>(binding, endpointAddress);