[ServiceContract(Namespace = "http://schemas.devleap.com/NW/CustomerManagerService")]
public interface ICustomerManagerService {
[OperationContract()]
Customers GetCustomer(CustomerKey key);

[OperationContract]
Customers UpdateCustomer(Customers customer);

[OperationContract]
Customers InsertCustomer(Customers customer);

[OperationContract]
DeletionResult DeleteCustomer(Customers customer);
}
