private void StartUpload_Click(object sender, RoutedEventArgs e)
        {
            FTPTool tool = new FTPTool(host, userName, password);

            tool.Upload(UploadFileNameTextBox.Text, SelectUploadFileTextBox.Text);
        }
        private void DeleteFTPFile_Click(object sender, RoutedEventArgs e)
        {
            FTPTool tool = new FTPTool(host, userName, password);

            tool.Delete(DeleteFTPFilePathTextBox.Text);
        }
        private void DeleteDirectory_Click(object sender, RoutedEventArgs e)
        {
            FTPTool tool = new FTPTool(host, userName, password);

            tool.DeleteDirectory(DeleteDirectoryNameTextBox.Text);
        }
        private void StartDownload_Click(object sender, RoutedEventArgs e)
        {
            FTPTool tool = new FTPTool(host, userName, password);

            tool.Download(DownloadFTPFileNameTextBox.Text, $"{SelectDownloadFilePathTextBox.Text}//{DownloadFileNameTextBox.Text}");
        }