public string CreateInitialUrl(RequestDateType dateType, DateTimeOffset start, DateTimeOffset end, int maxItems = 150)
 {
     return string.Format("{0}api/v2/Articles?typ={1}&von={2}&bis={3}&maxItems={4}",
         _endpoint,
         dateType,
         ToUnixTimeStamp(start),
         ToUnixTimeStamp(end),
         maxItems);
 }
 public ArticleListScroll CreateScroll(RequestDateType dateType, DateTimeOffset start, DateTimeOffset end)
 {
     var request = new ArticleRequestBuilder(_httpClient.BaseAddress, _apiKey).CreateInitialUrl(dateType, start, end, 5);
     return new ArticleListScroll(this) { NextPageLink = request };
 }