public void Remove_Existing_ChildRemovedAndCollectionChangedTriggered()
{
int collectionChangedCount = 0;
CanvasContainer container = new CanvasContainer();
CanvasObject co = new ButtonObject();
container.Add(co);
container.CollectionChanged += (sender, e) => collectionChangedCount++;
container.Remove(co);
Assert.AreEqual(1, collectionChangedCount);
Assert.AreEqual(0, container.Count);
}
