.NET WPF, Set Bitmap – Must create DependencySource on same Thread as the DependencyObject error

In WPF when you try to assign a bitmap to a property that’s bound to a UI element from a worker thread you may get the following error:

“Must create DependencySource on same Thread as the DependencyObject”

A simple way around this problem without having to jump through hoops and dispatch to the UI thread is to just freeze the bitmap before assigning it, like this:


var bitmap = new BitmapImage(new Uri(CurrentImageFilePath));
bitmap.Freeze();
this.CurrentImage = bitmap;

I hope this helps someone who’s stuck with this annoying error!