创建与wcf服务的连接时拒绝访问

Question

我有以下代码：

EndpointAddress endpointAddress = new EndpointAddress("http://www.verifythisaddress.com/AddressVerification/AddressVerificationService.svc");
            BasicHttpBinding serviceBinding = new BasicHttpBinding(BasicHttpSecurityMode.TransportCredentialOnly);
            serviceBinding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Windows;
            serviceBinding.ReceiveTimeout = new TimeSpan(0, 0, 120);

            AddressService.IAddressVerificationService client = new AddressService.AddressVerificationServiceClient(serviceBinding,endpointAddress);
            AddressService.Address verifiedAddress = null;

当我使用客户端应用程序运行此代码时，一切正常，但是当我在另一个应用程序中运行它时，相同的代码。我收到“Access is Denied”错误。这可能是IIS问题吗？我的问题是为什么它适用于Windows窗体应用程序，但不适用于其他应用程序。 感谢