What’s the best way to update an ObservableCollection from another thread?

Question

If you initialize the collection in the constructor it will be on the default Application thread.

To invoke the main thread you can do this:

Application.Current.Dispatcher.Invoke((Action)(() =>
    {
       //Do something here.
    }));

You have to cast the Anonymous delegate as an action otherwise it gets confused ¯\O_o/¯

If you are using the Async CTP then you can do this

Application.Current.Dispatcher.InvokeAsync(()=>
    {
       //Do something here.
    });