AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.2.9" />

 Entity

public sealed class Entity : Node
Represents an entity node.
public string InputEncoding { get; }

Gets the used input encoding.

public string NotationName { get; }

Gets the notation name.

public string PublicId { get; }

Gets the public identiifer.

public string SystemId { get; }

Gets the system identifier.

public string XmlEncoding { get; }

Gets the used XML encoding.

public string XmlVersion { get; }

Gets the used XML version.