public virtual void TestToString()
        {
            IChemObjectSet <IAtomContainer> containerSet = (IChemObjectSet <IAtomContainer>)NewChemObject();
            string description = containerSet.ToString();

            for (int i = 0; i < description.Length; i++)
            {
                Assert.IsTrue(description[i] != '\n');
                Assert.IsTrue(description[i] != '\r');
            }
        }