/// <summary>
 /// Extracts result from underlying check response
 /// </summary>
 /// <param name="response">Check response</param>
 public void ExtractResult(ResponseBase <ResContactCheck> response)
 {
     this.ContactInfos = response
                         .GetCDItems()
                         .Select(cd => new CheckInfo(cd.ObjectElement.Value, cd.Available, cd.Reason))
                         .ToList();
 }