AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.1" />

.NET API 1,172,480 bytes

 OptionsCollection

sealed class OptionsCollection : IHtmlOptionsCollection, IHtmlCollection, IEnumerable<IElement>, IEnumerable
A collection specialized on IHtmlOptionElement elements.
public IElement this[int index] { get; }

public IElement this[string name] { get; }

public int Length { get; }

public int SelectedIndex { get; set; }

public OptionsCollection(Node parent)

public void Add(IHtmlOptionElement element, IHtmlElement before = null)

public void Add(IHtmlOptionsGroupElement element, IHtmlElement before = null)

public IEnumerator<IElement> GetEnumerator()

public IHtmlOptionElement GetOptionAt(int index)

public void Remove(int index)

public void SetOptionAt(int index, IHtmlOptionElement value)