https://docs.microsoft.com/en-us/dotnet/api/system.reflection.customattributeextensions.getcustomattributes?view=netframework-4.8

It is not clear if the generic methods, like: GetCustomAttributes<T>(Assembly) searching inherit or not. Because the "regular" GetCustomAttributes" methods e.g. from System.Reflection.Assembly have a boolean parameter inherit.

The ones from the extensions are missing this inherit parameter!