Get Function From Another Project

Hi guys...
I'm trying to get function from another project...
I have added all references and so one...

e.g.

I want to get image in my project:

            PictureService obj = new PictureService(new NopObjectContext());
            Image1.ImageUrl = obj.GetPictureUrl(177, 200);

also i have added in my web.config "NopEntities" connection string...

and now it tells me that:
Object reference not set to an instance of an object.
in ~\Libraries\Nop.BusinessLogic\Infrastructure\IoC.cs Line 77

public static T Resolve<T>()
{
Line 77:  return _resolver.Resolve<T>();
}

Who can help? Just want to get imageurl from another project.

It seems you didn't register your service in the IoC.

Hello, having the sam problem, i cant get to have valid nopcontext.
Any help?