Cannot serialize a generic type 'System.Windows.FreezableCollection`

Question

Hopefully a simple question. I have a custom control with a dependency property that contains a list of another custom control.

public static readonly Dependenc         


        

Answer 1

Ok Silly me there is alot of information about this all over the net, the simple solution is to take the generic freezablecollection and derive a none generic class as below.

public class BlockObjectCollection : FreezableCollection<BlockObject>
{
}

then replace the dependency properties

    public static readonly DependencyProperty BlockObjectsProperty = DependencyProperty.Register("BlockObjects", typeof(BlockObjectCollection), typeof(Block), new FrameworkPropertyMetadata(new BlockObjectCollection(), null));
    public BlockObjectCollection BlockObjects
    {
        get { return (BlockObjectCollection)base.GetValue(BlockObjectsProperty); }
        set { base.SetValue(BlockObjectsProperty, value); }
    }