private void ExportarXML(Prova provaSelecionada) { try { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Filter = " XML file |*.xml"; saveFileDialog.RestoreDirectory = true; if (saveFileDialog.ShowDialog() == DialogResult.OK) { _serviceXML.ExportarXML(provaSelecionada, Path.GetFullPath(saveFileDialog.FileName)); } } catch (NullReferenceException) { throw new Exception("Selecione uma Prova!"); } catch (Exception ex) { throw new Exception(ex.Message); } }