Amoeba.Windows.UploadControl._listViewAddMenuItem_Click C# (CSharp) Method

        private void _listViewAddMenuItem_Click(object sender, RoutedEventArgs e)
        {
            var dialog = new System.Windows.Forms.OpenFileDialog();
            dialog.Multiselect = true;
            dialog.RestoreDirectory = true;

            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                var filePaths = new HashSet<string>(dialog.FileNames);

                Task.Run(() =>
                {
                    if (_uploadAddIsRunning) return;
                    _uploadAddIsRunning = true;

                    Thread.CurrentThread.IsBackground = true;

                    try
                    {
                        foreach (var informaiton in _amoebaManager.ShareInformation)
                        {
                            filePaths.Remove((string)informaiton["Path"]);
                        }

                        this.Dispatcher.Invoke(DispatcherPriority.Background, new Action(() =>
                        {
                            if (filePaths.Count == 1)
                            {
                                var window = new UploadWindow(filePaths.First(), false, _amoebaManager);
                                window.Owner = _mainWindow;
                                window.ShowDialog();
                            }
                            else if (filePaths.Count > 1)
                            {
                                var window = new UploadListWindow(filePaths, false, _amoebaManager);
                                window.Owner = _mainWindow;
                                window.ShowDialog();
                            }
                        }));
                    }
                    finally
                    {
                        _uploadAddIsRunning = false;
                    }
                });
            }
        }