Get Querystring Parameter

 public virtual T GetQueryString<T>(string name)
        {
            string queryParam = null;
            if (Request.QueryString[name] != null)
                queryParam = Request.QueryString[name];

            if (!String.IsNullOrEmpty(queryParam))
                return (T)TypeDescriptor.GetConverter(queryParam.GetType()).ConvertFrom(null, Thread.CurrentThread.CurrentCulture, queryParam);

            return default(T);
        }