C#: What are the differences between IAsyncEnumerable and IEnumerable?

1public async IAsyncEnumerable<int> GetNumbersAsync()
2{
3    for (int i = 0; i < 10; i++)
4    {
5        await Task.Delay(100);
6        yield return i;
7    }
8}

1await foreach (var number in GetNumbersAsync())
2{
3    Console.WriteLine(number);
4}

1using System.Linq.Async;
2
3var result = await GetNumbersAsync()
4    .Where(x => x > 5)
5    .SelectAsync(x => x * 2)
6    .ToListAsync();