public void TestEncapsulateBlockBuffer()
        {
            var b1 = new ActionBlock <int>(i => Console.WriteLine(i));
            var b2 = new BufferBlock <int>();

            IPropagatorBlock <int, int> b3 = DataflowBlock.Encapsulate(b1, b2);


            Assert.AreEqual(0, b3.GetBufferCount().Total());
        }