private void GenerateButton_OnClick(object sender, RoutedEventArgs e) { var canGenerate = true; if (canGenerate) { canGenerate = Path.IsPathRooted(generatePathTextBox.Text); } if (canGenerate) { try { using (File.Create(generatePathTextBox.Text)){ } File.Delete(generatePathTextBox.Text); } catch { canGenerate = false; } } if (canGenerate) { try { if (int.Parse(lineLengthTextBox.Text) < 0 || long.Parse(fileSizeTextBox.Text) < 0) { canGenerate = false; } else { if (!seedTextBox.Text.Equals("")) { int.Parse(seedTextBox.Text); } } } catch { canGenerate = false; } } if (canGenerate == false) { MessageBox.Show("Can't generate file: " + "\"" + generatePathTextBox.Text + "\"" , "Error" , MessageBoxButton.OK , MessageBoxImage.Error , MessageBoxResult.OK , MessageBoxOptions.None ); } else { var fileFullName = generatePathTextBox.Text; var lineLength = int.Parse(lineLengthTextBox.Text); var fileSize = long.Parse(fileSizeTextBox.Text); var seed = seedTextBox.Text.Equals("") ? new Random().Next() : int.Parse(seedTextBox.Text); FileGenerator generator = new TextGenerator(seed, lineLength, fileSize); var start = DateTime.Now; generator.GenerateFile(fileFullName); showDone(DateTime.Now - start); } }