private bool TryGetTarget(out WrappedModelBase<TInterface> target)
{
target = Target as WrappedModelBase<TInterface>;
if (IsAlive) return true;
target = null;
return false;
}
public WeakSubscription(WrappedModelBase<TInterface> wrapper)
: base(wrapper)
{
if (wrapper == null) throw new ArgumentNullException(nameof(wrapper));
_ModelInstance = wrapper.ModelInstance;
_PropertyChangedEventHandler = ModelInstance_PropertyChanged;
}