AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.4.1" />

 RuleNames

static class RuleNames
Contains all CSS rule names.
namespace AngleSharp.Css { internal static class RuleNames { public static readonly string Supports = "supports"; public static readonly string Charset = "charset"; public static readonly string Document = "document"; public static readonly string FontFace = "font-face"; public static readonly string Import = "import"; public static readonly string Keyframes = "keyframes"; public static readonly string Media = "media"; public static readonly string Namespace = "namespace"; public static readonly string Page = "page"; } }