public static class AotSafeExtensions
{
    // こんなメソッドを用意しておくと
    public static IEnumerable<T> AsSafeEnumerable<T>(this IEnumerable<T> source)
    {
        var e = ((IEnumerable)source).GetEnumerator();
        using (e as IDisposable)
        {
            while (e.MoveNext())
            {
                yield return (T)e.Current;
            }
        }
    }
}