public HubConnection Build()
{
if (_connectionFactoryDelegate == null)
{
throw new InvalidOperationException("Cannot create IConnection instance. The connection factory was not configured.");
}
IHubConnectionBuilder builder = this;
var loggerFactory = builder.GetLoggerFactory();
var hubProtocol = builder.GetHubProtocol();
return(new HubConnection(_connectionFactoryDelegate, hubProtocol ?? new JsonHubProtocol(), loggerFactory));
}