BroadcastBlock behavior test

Program.cs

using System;
using System.Linq;
using System.Threading.Tasks.Dataflow;
using System.Threading;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            BufferBlock<int> A = new BufferBlock<int>( new DataflowBlockOptions() { BoundedCapacity = 10 });
            BroadcastBlock<int> B = new BroadcastBlock<int>((n) => n, new DataflowBlockOptions() { BoundedCapacity = 10 });
            TransformBlock<int, int> C1 = new TransformBlock<int, int>(
                (n) =>
                {
                    Thread.Sleep(TimeSpan.FromMilliseconds(1000));
                    Console.WriteLine($"B: Event {n} is going through.");
                    return n;
                },
                new ExecutionDataflowBlockOptions() { BoundedCapacity = 2 });
            TransformBlock<int, int> C2 = new TransformBlock<int, int>(
                (n) =>
                {
                    Thread.Sleep(TimeSpan.FromMilliseconds(1000));
                    Console.WriteLine($"C: Event {n} is going through.");
                    return n;
                },
                new ExecutionDataflowBlockOptions() { BoundedCapacity = 2 });
            BufferBlock<int> D = new BufferBlock<int>();

            A.LinkTo(B);
            B.LinkTo(C1);
            B.LinkTo(C2);
            C1.LinkTo(D);
            C2.LinkTo(D);

            foreach (int i in Enumerable.Range(0, 20))
            {
                A.Post(i);
            }

            Console.ReadKey();
        }
    }
}