public void Drop()
        {
            var products       = CreateRandomRepository <Product>();
            var productManager = new MongoRepositoryManager <Product>(MongoUrl, products.CollectionName);

            products.Add(new Product()
            {
                Name = "Product 10", Description = "Product 10", Price = 10
            });
            Assert.True(productManager.Exists());
            productManager.Drop();
            Assert.False(productManager.Exists());
        }
        public void NotExists()
        {
            var em = new MongoRepositoryManager <Product>(MongoUrl);

            Assert.False(em.Exists());
        }