protected override Task OnConnected(IRequest request, string connectionId)
{
string deviceID = request.QueryString["deviceId"].ToLowerInvariant();
TableStorageHelper tableStorage = new TableStorageHelper();
var devEntity = new DeviceEntity("device", deviceID)
{
ConnectionID = connectionId
};
tableStorage.AddOfUpdateDevice(devEntity);
return(Connection.Broadcast("Connection " + connectionId + " connected"));
}