public virtual void TestRemoveChemModel_int()
{
IChemSequence cs = (IChemSequence)NewChemObject();
cs.Add(cs.Builder.NewChemModel());
cs.Add(cs.Builder.NewChemModel());
cs.Add(cs.Builder.NewChemModel());
Assert.AreEqual(3, cs.Count);
cs.RemoveAt(1);
Assert.AreEqual(2, cs.Count);
}