public void TestCreateAndRetrieve()
{
var address = _client.CreateAddress(_testAddress).Result;
Assert.IsNotNull(address.Id);
Assert.AreEqual(address.Company, "Simpler Postage Inc");
Assert.IsNull(address.Name);
var retrieved = _client.GetAddress(address.Id).Result;
Assert.AreEqual(address.Id, retrieved.Id);
}