private void CreateDevices(Device[] devices)
{
var all = devices.Select(x => DeviceFactory.CreateDevice(this, x)).ToArray();
var grouped = all.ToLookup(x => x.id.Split('_').First());
Devices = grouped.Where(x => x.Count() == 1).Select(x => x.First())
.Concat(
grouped.Where(x => x.Count() > 1).Select(x => DeviceFactory.CreateMultiDevice(x))
)
.ToArray();
deviceCache = all.ToDictionary(x => x.id);
}