using System;

using System.IO;

using System.Threading.Tasks;

using System.Buffers;

public class Program

{

    public static async Task Main()

    {

        var stream = new MemoryStream();

        stream.WriteByte(1);

        stream.Position = 0;

        using(var owner = MemoryPool<byte>.Shared.Rent())

        {

            var readed = await stream.ReadAsync(owner.Memory);

            readed.Dump();

            owner.Memory.ToArray().Dump();

        }

    }

}