public void Build(RepairisDbContext context)
        {
            //Add some manufacturers
            context.Manufacturers.AddOrUpdate(
                m => m.ManufacturerName,
                new Manufacturer { ManufacturerName = "Canon" },
                new Manufacturer { ManufacturerName = "Nikon" },
                new Manufacturer { ManufacturerName = "Sigma"}
              );
            context.SaveChanges();

        }