AngleSharp by Florian Rappl

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

.NET API 844,288 bytes

 CSSPerspectiveProperty

public sealed class CSSPerspectiveProperty : CSSProperty
More information available at: https://developer.mozilla.org/en-US/docs/Web/CSS/perspective
public Length Distance { get; }

Gets the distance from the user to the z=0 plane. It is used to apply a perspective transform to the element and its content. If it 0 or a negative value, no perspective transform is applied.