public void ShouldDeleteHashtag()
        {
            //arrange
            var user    = GenerateUser();
            var hashtag = Guid.NewGuid().ToString();

            //act
            var dataLayer = new DataLayer.Sql.DataLayer(ConnectionSql);

            dataLayer.AddUser(user);

            var photo = GeneratePhoto(user.Id);

            dataLayer.AddPhoto(photo);

            var comment = GenerateComment(user.Id, photo.Id);

            dataLayer.AddComment(comment);
            comment = dataLayer.AddHashtag(comment, hashtag);

            dataLayer.DeleteHashtag(comment, hashtag);

            var haveHashtag = dataLayer.HaveHashtag(comment, hashtag);

            //assert
            Assert.AreEqual(haveHashtag, false);
        }