protected virtual void OnChildDeleted(object sender, EventArgs e)
{
ExportableViewModel evm = sender as ExportableViewModel;
if (evm == null)
{
throw new ArgumentException("ExportableViewModel expected!");
}
UnregisterExportableChild(evm);
}
protected void UnregisterExportableChild(ExportableViewModel child)
{
child.StateChanged -= OnChildStateChanged;
child.Deleted -= OnChildDeleted;
children.Remove(child);
}
protected void RegisterExportableChild(ExportableViewModel child)
{
child.StateChanged += OnChildStateChanged;
child.Deleted += OnChildDeleted;
children.Add(child);
}