private void check_s3(S3 v, int?a, int?b, int?c, int?d, int?e, int?f) { check_s2(v, a, b, c, d); Assert.AreEqual(e, v.e); Assert.AreEqual(e, v.GetE()); Assert.AreEqual(f, v.f); Assert.AreEqual(f, v.GetF()); }