MVVM Утечка памяти

ICollection myCollection = someCollection;
lock(myCollection.SyncRoot)
{
    foreach (object item in myCollection)
    {
        // Insert your code here.
    }
}

public ObservableCollection<Students> Students { get; } = new ObservableCollection<Student>();
 
public MainViewModel()
{
    BindingOperations.EnableCollectionSynchronization (((ICollection)Students).SyncRoot);
    _someModel.Added += OnStudentAdded;
}
 
private void OnStudentAdded(object sender, Student student)
{
    lock(((ICollection)Students).SyncRoot)
    {
        Students.Add(student);
    };
}

    public class DispatcherObservableCollection<T> : ObservableCollection<T>
    {
        private static readonly Dispatcher staticDispatcher = Application.Current.Dispatcher;
 
        public DispatcherObservableCollection()
        {
        }
 
        public DispatcherObservableCollection(IEnumerable<T> collection) : base(collection)
        {
        }
 
        public DispatcherObservableCollection(List<T> list) : base(list)
        {
        }
 
        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
        {
            // Проверка потока.
            if (staticDispatcher.CheckAccess())
                base.OnCollectionChanged(e);
            else
                // Маршалинг вызова метода в поток диспетчера.
                staticDispatcher.BeginInvoke(OnCollectionChanged, e);
        }
    }