IReadOnlyList.cs

using System.Runtime.CompilerServices;

namespace System.Collections.Generic
{
    [TypeDependency("System.SZArrayHelper")]
    [__DynamicallyInvokable]
    public interface IReadOnlyList<out T> : IReadOnlyCollection<T>, IEnumerable<T>, IEnumerable
    {
        [__DynamicallyInvokable]
        T this[int index]
        {
            [__DynamicallyInvokable]
            get;
        }
    }
}