public TESTClient TestContext()

         {

             var binding = new BasicHttpBinding();

             binding.MaxReceivedMessageSize = int.MaxValue;

             binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic;

             binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;

             string Host = "webservice地址";

             var address = new EndpointAddress(Host);

             var method= new TESTClient (binding, address);

             method.ClientCredentials.ServiceCertificate.Authentication.CertificateValidationMode = X509CertificateValidationMode.None;

             method.ClientCredentials.UserName.UserName = "用户名";

             method.ClientCredentials.UserName.Password = "密码";

             return method;

         }

 public string Test(string str)

         {

             var s = new TestService();

             var result = s.TestContext().TestMethod(str);

             return result;

         }