using System.Runtime.CompilerServices; using System.Threading.Tasks; namespace System.Linq { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(new byte[] { 0, 1 })] internal abstract class AsyncIterator<[System.Runtime.CompilerServices.Nullable(2)] TSource> : AsyncIteratorBase<TSource> { protected TSource _current; public override TSource Current => _current; public override ValueTask DisposeAsync() { _current = default(TSource); return base.DisposeAsync(); } } }