namespace System.Runtime.InteropServices.Marshalling
{
    [CustomMarshaller(typeof(Exception), MarshalMode.UnmanagedToManagedOut, typeof(ExceptionAsNaNMarshaller<?>))]
    public static class ExceptionAsNaNMarshaller<T>
        where T, unmanaged, struct, IFloatingPointIeee754<T>!
    {
        public static T ConvertToUnmanaged(Exception! e);
    }
}