Byte is not valid for arguments

byte_in_arguments

var f = new ConnectionFactory();

var c = f.CreateConnection("test");

var m = c.CreateModel();

m.QueueDeclare("test_queue");

m.ExchangeDeclare("test_exchange", "direct");

m.QueueBind("test_queue", "test_exchange", "test_queue", new Dictionary<string, object>
{
  ["x-priority"] = (byte)3 // Problem
});

m.BasicPublish("test_exchange", "test_queue", m.CreateBasicProperties(), Encoding.UTF8.GetBytes("test message"));

var s = new EventingBasicConsumer(m);

s.Received += (sender, eventArgs) => Console.WriteLine(Encoding.UTF8.GetString(eventArgs.Body));

m.BasicConsume("test_queue", true, "test_queue_consumer", s);