如何在SignalR的.NET核心版本中传递/检索查询字符串值？

var connection = new HubConnectionBuilder()
    .WithUrl("http://localhost:5000/chatHub?name=John")
    .Build();

public class ChatHub : Hub
{
    public async Task SendMessage(string message)
    {
        var httpContext = Context.GetHttpContext();
        var name = httpContext.Request.Query["name"];
        await Clients.All.SendAsync("ReceiveMessage", name, message);
    }
}