AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.6.0" />

 HtmlCollection<T>

A specialized collection containing elements of type T.
public T this[int index] { get; }

public T this[string id] { get; }

public int Length { get; }

public HtmlCollection(IEnumerable<T> elements)

Creates a new list of elements.

public HtmlCollection(INode parent, bool deep = true, Predicate<T> predicate = null)

Creates a new live collection for the given parent.