Describe the bug

A clear and concise description of what the bug is. Hi, I'm trying to create a HubConnection on a Console App, but getting an error with .WithUrl.

Receiving the following error:

HubConnectionBuilder' does not contain a definition for 'WithUrl' and no accessible extension method 'WithUrl' accepting a first argument of type 'HubConnectionBuilder' could be found

My code:

using Microsoft.AspNetCore.SignalR.Client;

    class Program

    {

        public static async Task Main(string[] args)

        {

            var connection =  new HubConnectionBuilder()

           .WithUrl("https://localhost:44386/NotificationHub")

           .Build();

            await connection.StartAsync();
            while (true)
            {
                try
                {
                    await connection.StartAsync();

                    break;
                }
                catch
                {
                    await Task.Delay(1000);
                }
            }

            Console.WriteLine("Client One listening. Hit Ctrl-C to quit.");
            Console.ReadLine();
        }
    }
}

Yeah,