public class ReadOnlyCollection<T> : ICollection<T>, IEnumerable<T>, IEnumerable, IList<T>, IReadOnlyCollection<T>, IReadOnlyList<T>, ICollection, IList

public int Count { get; }

public T this[int index] { get; }

protected IList<T> Items { get; }

public ReadOnlyCollection(IList<T> list)

public bool Contains(T value)

public void CopyTo(T[] array, int index)

public IEnumerator<T> GetEnumerator()

public int IndexOf(T value)