public abstract class BaseService<TMessage> : Hub
{
    private readonly IHubContext _hub;

    public BaseService()
    {
        _hub = (IHubContext) GlobalHost.ConnectionManager
            .GetType()
            .GetMethod("GetHubContext", new Type[0])
            .MakeGenericMethod(GetType())
            .Invoke(GlobalHost.ConnectionManager, new object[0]);
    }

    public void Send(TMessage message)
    {
        _hub.Clients.All.Receive(message);
    }
}

["Service"]
public class Service : BaseService<char>, IService<char>
{
}

var hubConnection = new HubConnection("http://localhost:7800/myservice");
_hubProxy = hubConnection.CreateHubProxy("Service");

hubConnection.CreateHubProxy(typeof(IService<T>).ToString());

this.HubName = this.GetType().ToString();