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有時候在 Winform Client 程式須動態切換聯繫的服務端點，例如要從 www.origin.com/site/Service.svc 轉至 www.new.com/website/Service.svc，Client 的 app.config 如下

程式中重新設定 EndpointAddress，如下

string uri = "http://www.new.com/website/Service.svc";
string dns = "www.new.com";

ServiceClient service = new ServiceClient();              
AddressHeaderCollection headers = service.Endpoint.Address.Headers;
EndpointIdentity identity = EndpointIdentity.CreateDnsIdentity(dns);
EndpointAddress addr = new EndpointAddress(new Uri(uri), identity, headers);
service.Endpoint.Address = addr;