https://learn.microsoft.com/en-us/dotnet/api/system.security.permissions.reflectionpermissionattribute?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0&redirectedfrom=MSDN
ReflectionPermissionAttribute Class (System.Security.Permissions) | Microsoft Learn
Allows security actions for ReflectionPermission to be applied to code using declarative security.
class systemsecuritypermissionsmicrosoftlearn