GoogleApi.Helpers.QueryStringParametersList.Add C# (CSharp) Method

        public void Add(string key, string value)
        {
            if (key == null)
                throw new ArgumentNullException(nameof(key));

            if (value == null)
                throw new ArgumentNullException(nameof(value));

            if (this.List.ContainsKey(key))
            {
                this.List[key] = value;
            }
            else
            {
                this.List.Add(key, value);
            }
        }

        protected virtual QueryStringParametersList GetQueryStringParameters()
        {
            var _parameters = new QueryStringParametersList();

            if (!string.IsNullOrWhiteSpace(this.Key))
                _parameters.Add("key", this.Key);

            _parameters.Add("sensor", Sensor.ToString().ToLower());

            return _parameters;
        }