SynchronizationContext.Current is null on resolving with Unity in WPF

Question

I have a WPF Code which looks something like this.

public class AlphaProductesVM : BaseModel
{
    private  ObservableCollection

        

Answer 1

I'm not sure if this will be a popular suggestion, but you could lazily create and subscribe to your collection. Then the first access to NwCustomers from the UI thread will kick everything off correctly.

public AlphaProductesVM (){}

public ObservableCollection NwCustomers
{
    get { 
          if(_NwCustomers == null)
          {
              _NwCustomers = new ObservableCollection();
              var repository = new NorthwindRepository();
                  repository
                  .GetAllProducts()
                  .ObserveOn(SynchronizationContext.Current)
                  .Subscribe(AddElement);
          }
          return _NwCustomers; 
    }
}

or, if you inject the UI thread's dispatcher into your view model you can subscribe on that in the constructor.

              var repository = new NorthwindRepository();
                  repository
                  .GetAllProducts()
                  .ObserveOn(theUIdispatcher)
                  .Subscribe(AddElement);