Inconsistent accessibility

What is the following error :

Inconsistent accessibility: parameter type '----.Messagetypes' is less

accessible than method '---.MessageBox---.Messagetypes, string)'

my code :

public partial class Global
{
    private  enum Messagetypes { Error };

    public  void MessageBox(Messagetypes MessageDisplay, string MessageError)
    {

    }
}

What is the correct code

Messagetypes is private, but is a parameter to a public function. The only people that would ever be able to call it are other private members. Either change your function to private, or change your enum to public.

You can't have Messagetype be private since apparently your application is trying to use it outside of the Global class. Change it to public and it should work.