private void StartStopHandler()
        {
            var _uiDispatcher = Dispatcher.CurrentDispatcher;

            if (!IsRun)
            {
                IsRun = true;
                Output.Clear();
                _threadManager.Init(ValueToFind, ThreadsCount, Delay);
                _threadManager.Start((x) =>
                {
                    lock ( Output )
                    {
                        if (!_threadManager.IsAborted && IsRun)
                        {
                            Action act = () =>
                            {
                                if (IsRun)
                                {
                                    Output.Add(x);
                                }
                            };
                            _uiDispatcher.Invoke(act);
                        }
                        else
                        {
                            if (IsRun)
                            {
                                IsRun         = false;
                                Action msgBox = () =>
                                {
                                    MessageBox.Show("Число найдено!", "Сообщение");
                                    _threadManager.Stop();
                                };
                                _uiDispatcher.Invoke(msgBox);
                            }
                        }
                    }
                });
            }
            else
            {
                IsRun = false;
                _threadManager.Stop();
            }
        }