Service Reference Error after Update 2

After updating to Update 2 RC, I am getting errors with my Service References. I am getting the following errors on this code:

ObservableCollection<ServiceReference1.OSTYPE> list = await myservice.GetOSTypesAsync();

Error 1 Cannot implicitly convert type 'InventoryWatch.ServiceReference1.OSTYPE[]' to 'System.Collections.ObjectModel.ObservableCollection<InventoryWatch.ServiceReference1.OSTYPE>'

I have removed and added the reference, but not sure what to do how.