EmitLogTopic.cs

using System;
using System.Linq;
using RabbitMQ.Client;
using System.Text;

class EmitLogTopic
{
    public static void Main(string[] args)
    {
        var factory = new ConnectionFactory() { HostName = "localhost" };
        using(var connection = factory.CreateConnection())
        using(var channel = connection.CreateModel())
        {
            channel.ExchangeDeclare(exchange: "topic_logs", type: "topic");

            var routingKey = (args.Length > 0) ? args[0] : "anonymous.info";
            var message = (args.Length > 1) ? string.Join(" ", args.Skip(1).ToArray()) : "Hello World!";
            var body = Encoding.UTF8.GetBytes(message);
            channel.BasicPublish(exchange: "topic_logs", routingKey: routingKey, basicProperties: null, body: body);
            Console.WriteLine(" [x] Sent '{0}':'{1}'", routingKey, message);
        }
    }
}