using RabbitMQ.Client;
using System.Text;

var factory = new ConnectionFactory() { HostName = "localhost" };
using (var connection = factory.CreateConnection())
using (var channel = connection.CreateModel())
{
    // Создание очереди
    channel.QueueDeclare(queue: "my_queue", durable: false, exclusive: false, autoDelete: false, arguments: null);
    // Отправка сообщения
    string message = "Hello, RabbitMQ!";
    var body = Encoding.UTF8.GetBytes(message);
    channel.BasicPublish(exchange: "", routingKey: "my_queue", basicProperties: null, body: body);
    Console.WriteLine("Message sent");
}