<PackageReference Include="System.Memory" Version="4.6.2" />

System.Buffers.IMemoryOwner<T>

public interface IMemoryOwner<T> : IDisposable
Owner of MemoryT that is responsible for disposing the underlying memory appropriately.
namespace System.Buffers { public interface IMemoryOwner<T> : IDisposable { Memory<T> Memory { get; } } }