internal void EnsureMutability(IPreChangeNotifier notifier)
{
if (mutableCount == 0)
{
throw new InvalidOperationException("The area is not in mutable state, cannot change it or any of its members.");
}
}
void Changed(IPreChangeNotifier obj)
{
lock (syncRoot)
{
SetDirty();
}
}
protected void ChangeDelegate(IPreChangeNotifier n)
{
Changed();
}
protected void TriggerChanged(IPreChangeNotifier n)
{
this.Changed();
}
void ChangeChild(IPreChangeNotifier n)
{
PreChanged();
}
