AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.6.1" />

.NET API 886,784 bytes

 HTMLSourceElement

sealed class HTMLSourceElement : HTMLElement, IHtmlSourceElement, IHtmlElement, IElement, INode, IEventTarget, IParentNode, IChildNode, INonDocumentTypeChildNode, IElementCssInlineStyle
Represents the HTML source element.
public string Media { get; set; }

Gets or sets the intended type of the media resource.

public string Source { get; set; }

Gets or sets the URL for the media resource.

public string Type { get; set; }

Gets or sets the type of the media source.