消費者：

 static void Main(string[] args)
        {
            ConnectionFactory factory = new ConnectionFactory()
            {
                HostName = "192.168.254.40",
                UserName = "admin",
                Password = "admin",
            };

            //第一步：建立connection 
 

            var connection = factory.CreateConnection();

            //第二步：建立一個channel
            var channel = connection.CreateModel();

            //第三步：申明交換機【因為rabbitmq已經有了自定義的ampq default exchange】
            channel.ExchangeDeclare("mytopicexchange", ExchangeType.Topic, true, false, null
 
);

            //第四步：建立一個佇列(queue)
            channel.QueueDeclare("mytopicqueue", true, false, false, null);

            //將queue繫結到exchange之上。。。。
            channel.QueueBind("mytopicqueue", "mytopicexchange", "*.com", null);

            EventingBasicConsumer consumer = new EventingBasicConsumer(channel);

            consumer.Received 
 
+= (sender, e) =>
            {
                var msg = Encoding.UTF8.GetString(e.Body);

                Console.WriteLine(msg);
            };

            channel.BasicConsume("mytopicqueue", true, consumer);

            Console.WriteLine("consumer1 端啟動完畢！！！");

            Console.Read();
        }

生產者：

static void Main(string[] args)
        {
            ConnectionFactory factory = new ConnectionFactory()
            {
                HostName = "192.168.254.40",
                UserName = "admin",
                Password = "admin",
            };

            //第一步：建立connection
            var connection = factory.CreateConnection();

            //第二步：建立一個channel
            var channel = connection.CreateModel();

            for (int i = 0; i < 100; i++)
            {
                var msg = Encoding.UTF8.GetBytes(string.Format("{0} :{1}", i, "你好"));

                var routingKey = i % 13 == 0 ? "a.com" : "*.cn";

                //第五步：釋出訊息
                channel.BasicPublish("mytopicexchange", routingKey: routingKey, basicProperties: null, body: msg);

                Console.WriteLine(i);
            }
        }

當生產者routingkey 為a.com,消費者*.com 會匹配上