namespace System.Collections.Async { public static class IAsyncEnumeratorExtensions { public static Task<TSource> FirstAsync<TSource>(this IAsyncEnumerator<TSource> source, CancellationToken token = default(CancellationToken), bool disposeSource = true); public static async Task<TSource> FirstAsync<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, bool> predicate, CancellationToken token = default(CancellationToken), bool disposeSource = true); public static Task<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerator<TSource> source, CancellationToken token = default(CancellationToken), bool disposeSource = true); public static async Task<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, bool> predicate, CancellationToken token = default(CancellationToken), bool disposeSource = true); public static IAsyncEnumerator<TResult> Select<TSource, TResult>(this IAsyncEnumerator<TSource> source, Func<TSource, TResult> selector, bool disposeSource = true); public static IAsyncEnumerator<TResult> Select<TSource, TResult>(this IAsyncEnumerator<TSource> source, Func<TSource, long, TResult> selector, bool disposeSource = true); public static IAsyncEnumerator<TSource> Take<TSource>(this IAsyncEnumerator<TSource> source, int count, bool disposeSource = true); public static IAsyncEnumerator<TSource> TakeWhile<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, bool> predicate, bool disposeSource = true); public static async Task<List<T>> ToListAsync<T>(this IAsyncEnumerator<T> source, CancellationToken cancellationToken = default(CancellationToken), bool disposeSource = true); public static async Task<T[]> ToArrayAsync<T>(this IAsyncEnumerator<T> source, CancellationToken cancellationToken = default(CancellationToken), bool disposeSource = true); public static IAsyncEnumerator<TSource> Skip<TSource>(this IAsyncEnumerator<TSource> source, int count, bool disposeSource = true); public static IAsyncEnumerator<TSource> SkipWhile<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, bool> predicate, bool disposeSource = true); public static IAsyncEnumerator<TSource> Where<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, bool> predicate, bool disposeSource = true); public static IAsyncEnumerator<TSource> Where<TSource>(this IAsyncEnumerator<TSource> source, Func<TSource, long, bool> predicate, bool disposeSource = true); } }