public async Task CsvEntityRecognizerTests_NoUrl()
        {
            var er = new CsvEntityRecognizer()
            {
            };

            try
            {
                await er.RecognizeEntitiesAsync(dc, new List <Entity>());

                Assert.Fail("Should have thrown exception");
            }
            catch (ArgumentNullException)
            {
            }
        }
        public async Task CsvEntityRecognizerTests_BadUrl()
        {
            var er = new CsvEntityRecognizer()
            {
                Url = "foo://"
            };

            try
            {
                await er.RecognizeEntitiesAsync(dc, new List <Entity>());

                Assert.Fail("Should have thrown exception");
            }
            catch (Exception)
            {
            }
        }