public EFReviewRepository(MariosDbContext connection = null)
 {
     if (connection == null)
     {
         db = new MariosDbContext();
     }
     else
     {
         db = connection;
     }
 }
 public EFProductRepository(MariosDbContext connection = null)
 {
     if (connection == null)
     {
         this.db = new MariosDbContext();
     }
     else
     {
         this.db = connection;
     }
 }