AngleSharp by Florian Rappl

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

 Attr

public sealed class Attr : Node, IAttr, INode
Represents a generic node attribute.
public bool IsId { get; }

Gets whether the attribute is an ID attribute.

public string Name { get; }

Gets the name of the attribute.

public bool Specified { get; }

Gets if this attribute was explicitly given a value in the document.

public string Value { get; set; }

Gets or sets the value of the attribute.