<PackageReference Include="NETStandard.Library" Version="2.0.1" />

System.Xml.IFragmentCapableXmlDictionaryWriter

namespace System.Xml { public interface IFragmentCapableXmlDictionaryWriter { bool CanFragment { get; } void EndFragment(); void StartFragment(Stream stream, bool generateSelfContainedTextFragment); void WriteFragment(byte[] buffer, int offset, int count); } }