/// <summary>
        /// Подсчет ссылок
        /// </summary>
        /// <returns></returns>
        public async Task RequestUrl()
        {
            ErrorMessage = string.Empty;
            await RequestWrapper.AwaitAsync(
                cancelableAction : async token =>
            {
                string htmlMessage = await mUrlRequestService.RequestUrl(Url);
                return(await mUrlParseService.GetReferenceCount(htmlMessage));
            },
                callbackAction : result =>
            {
                if (mCancellationTokenSource.IsCancellationRequested)
                {
                    return;
                }
                ReferenceCount = result;
            },
                alertAction : exception =>
            {
                ErrorMessage = exception.Message;
            }, scheduler : TaskScheduler.FromCurrentSynchronizationContext());

            if (mCancellationTokenSource.IsCancellationRequested)
            {
                return;
            }
            await mMaxReferenceCountSelectDelegateInvoker();
        }