private void BtnLocalMatherials_Click(object sender, RoutedEventArgs e) { SaveFileDialog saveFile = new SaveFileDialog(); saveFile.Filter = @"(*.zip)|*.zip"; saveFile.FileName = String.Format($"{TxbxUser.Text} {TxbxTitle.Text}.zip"); if (saveFile.ShowDialog() == true) { Task task = new Task(() => courseRepository.DownloadFileToDb("172.20.2.221", UserId, Filepath, saveFile.FileName)); task.Start(); } }