public static void Instance() { OpenFileDialog OpenDlg = new OpenFileDialog(); OpenDlg.DefaultExt = ".xml"; OpenDlg.Filter = "Xml Files|*.xml"; if (OpenDlg.ShowDialog() == true) { ImportWindow NewForm = new ImportWindow(); try { NewForm.MediaList.DisplayData(NewForm.business.ImportPreview(OpenDlg.FileName)); } catch { MessageBox.Show("Cannot load file.", "Result"); return; } SessionCore.Instance.Windows.Show(NewForm); } }