<PackageReference Include="System.IO.Pipelines" Version="11.0.0-preview.5.26302.115" />

System.IO.StreamPolyfills

static class StreamPolyfills
namespace System.IO { internal static class StreamPolyfills { public sealed class <G>$50F26341F4F164F9281EDEBBEB746904 { public static class <M>$05FA4CA844D6F809592CA75BE4C36206 { } public void ReadExactly(byte[] buffer); public Task CopyToAsync(Stream destination, CancellationToken cancellationToken); } public static void ReadExactly(this Stream stream, byte[] buffer); public static Task CopyToAsync(this Stream stream, Stream destination, CancellationToken cancellationToken); } }