AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.3" />

 MouseButtons

public enum MouseButtons
All possible mouse button values that are currently pressed.
using System; namespace AngleSharp.Dom.Events { [Flags] public enum MouseButtons : ushort { None = 0, Primary = 0, Secondary = 2, Auxiliary = 4 } }