AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.0" />

.NET API 1,171,968 bytes

CssRightProperty

sealed class CssRightProperty : CssCoordinateProperty, ICssRightProperty, ICssProperty

Information can be found on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/right

public Length? Right { get; }