public void TestMethodCountObjects()
        {
            int typePipe    = 3;
            int typeNodes   = 2;
            int countPipes  = 0;
            int countNodes  = 0;
            var toolkitSWMM = new SWMMToolkit();

            int error = toolkitSWMM.Open(f1, f2, f3);

            error = toolkitSWMM.Start(0);
            error = toolkitSWMM.CountObjects(typePipe, ref countPipes);
            error = toolkitSWMM.CountObjects(typeNodes, ref countNodes);

            Assert.AreEqual(0, error);
            Assert.AreEqual(21, countPipes);
        }