rabbitmq-tutorials/dotnet/NewTask/NewTask.cs

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

class NewTask
{
    public static void Main(string[] args)
    {
        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);

            var message = GetMessage(args);
            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);
        }

        Console.WriteLine(" Press [enter] to exit.");
        Console.ReadLine();
    }

    private static string GetMessage(string[] args)
    {
        return ((args.Length > 0) ? string.Join(" ", args) : "Hello World!");
    }
}