C# 从url获取get参数键值对

Dictionary<string, string> getQueryStringFromURL(string url)
        {
            var result = new Dictionary<string, string>();
            var uri = new Uri(url, true);
            var queryStrings = System.Web.HttpUtility.ParseQueryString(uri.Query);
            foreach (var key in queryStrings.Keys)
                result.Add(key.ToString(), queryStrings[key.ToString()]);
            return result;
        }