解决方法
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///Create a new instance of the usps Manager class ///The constructor takes 2 arguments,the first is ///your usps Web Tools User ID and the second is ///true if you want to use the usps Test Servers. uspsManager m = new uspsManager("YOUR_USER_ID",true); Address a = new Address(); a.Address2 = "6406 Ivy Lane"; a.City = "Greenbelt"; a.State = "MD"; ///By calling ValidateAddress on the uspsManager object,///you get an Address object that has been validated by the ///usps servers Address validatedAddress = m.ValidateAddress(a);