<PackageReference Include="NETStandard.Library" Version="2.0.0" />

System.IO.MemoryStream

public class MemoryStream : Stream
namespace System.IO { public class MemoryStream : Stream { public virtual int Capacity { get; set; } public MemoryStream(); public MemoryStream(byte[] buffer); public MemoryStream(byte[] buffer, bool writable); public MemoryStream(byte[] buffer, int index, int count); public MemoryStream(byte[] buffer, int index, int count, bool writable); public MemoryStream(byte[] buffer, int index, int count, bool writable, bool publiclyVisible); public MemoryStream(int capacity); public virtual byte[] GetBuffer(); public virtual byte[] ToArray(); public virtual bool TryGetBuffer(out ArraySegment<byte> buffer); public virtual void WriteTo(Stream stream); } }