Have you had practical experience using message exchange systems through brokers?

Yes, I have practical experience working with messaging systems through brokers such as RabbitMQ and Apache Kafka. In C# projects, I used these brokers to organize asynchronous interactions between microservices. This helps to offload main services, increase scalability, and ensure reliable message delivery.

Example of using RabbitMQ with C# (using the RabbitMQ.Client library):

var factory = new ConnectionFactory() { HostName = "localhost" };
using(var connection = factory.CreateConnection())
using(var channel = connection.CreateModel())
{
    channel.QueueDeclare(queue: "task_queue",
                         durable: true,
                         exclusive: false,
                         autoDelete: false,
                         arguments: null);

    string message = "Hello World!";
    var body = Encoding.UTF8.GetBytes(message);

    var properties = channel.CreateBasicProperties();
    properties.Persistent = true;

    channel.BasicPublish(exchange: "",
                         routingKey: "task_queue",
                         basicProperties: properties,
                         body: body);
    Console.WriteLine(" [x] Sent {0}", message);
}