<PackageReference Include="System.Security.Permissions" Version="10.0.1" />

System.Security.Permissions.WebBrowserPermission

The WebBrowserPermission object controls the ability to create the WebBrowser control.
namespace System.Security.Permissions { public sealed class WebBrowserPermission : CodeAccessPermission, IUnrestrictedPermission { public WebBrowserPermissionLevel Level { get; set; } public WebBrowserPermission(); public WebBrowserPermission(PermissionState state); public WebBrowserPermission(WebBrowserPermissionLevel webBrowserPermissionLevel); public bool IsUnrestricted(); } }