public void ExpireKeyTest()
        {
            var          keyName  = KeyName();
            const string keyValue = "1.0";

            _redisService.Remove(keyName);
            _redisService.SetString(keyName, keyValue);

            //check if the key exist
            var result = _redisService.GetString(keyName);

            Assert.Equal(keyValue, result);

            //expire the key
            _redisService.ExpireKey(keyName, TimeSpan.FromSeconds(2));
            Task.Delay(2100).GetAwaiter().GetResult();

            //check if the key exist
            var result2 = _redisService.GetString(keyName);

            Assert.Null(result2);
        }