AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.9.0" />

.NET API 1,204,224 bytes

 HtmlOptionsGroupElement

sealed class HtmlOptionsGroupElement : HtmlElement, IHtmlOptionsGroupElement, IHtmlElement, IElement, INode, IEventTarget, IMarkupFormattable, IParentNode, IChildNode, INonDocumentTypeChildNode, IElementCssInlineStyle
Represents the HTML optgroup element.
public bool IsDisabled { get; set; }

Gets or sets if the optgroup is enabled or disabled.

public string Label { get; set; }

Gets or sets the label.

public HtmlOptionsGroupElement(Document owner, string prefix = null)

Creates a new HTML optgroup element.