Unable to connect to RabbitMQ bus after upgrading EasyNetQ to version 6.0.1 or later

I am having issues connecting to Rabbit after upgrading EasyNetQ to version 6.0.1 or later.

To ensure that there wasn't any other parts of the application creating these issues, I made a minimal project to test this, and I had the same issues there.

This is the entirety of my program:

using EasyNetQ;using RabbitMQ.Client;using System;namespace MinimalRabbitProject{    internal class Program    {        static void Main(string[] args)        {            var connectionString = "host=localhost;username=test;password=test";            using (var bus = RabbitHutch.CreateBus(connectionString))            {                Console.WriteLine("Connected to RabbitMQ");            }        }    }}

This just seems to "fail silently". I get no errors/exceptions. However bus.Advanced.IsConnected is false, and I see no connection in RabbitMQ Management.

If I downgrade EasyNetQ to the previous version (5.6.0), this works fine, and I can see the connection in RabbitMQ Management.

I have tried upgrading to the latest version (7.8.0), but that doesn't work either. 5.6.0 is the last version that works.

From the release notes for version 6, I couldn't see anything that should affect creating a connection. My code is also the same as their sample code.

Using the RabbitMQ.Client library directly also works:

ConnectionFactory factory = new ConnectionFactory(){    UserName = "test",    Password = "test",    VirtualHost = "/",    HostName = "localhost",    Port = 5672};var connection = factory.CreateConnection();

Anybody got any tips about how I can get this working? If it matters, I am using RabbitMQ 3.12.12 and Erlang 25.3.2.8 locally. I have tried against a different server also, with same results (unsure about versions, but different than mine)