public void Test_clone()
        {
            DateFormat format = DateFormat.GetInstance();
            DateFormat clone  = (DateFormat)format.Clone();

            NUnit.Framework.Assert.IsTrue(format.Equals(clone), "Clone not equal");
            clone.GetNumberFormat().SetMinimumFractionDigits(123);
            NUnit.Framework.Assert.IsTrue(!format.Equals(clone), "Clone shares NumberFormat");
        }