private void Cert_Button(object sender, RoutedEventArgs e) { var rowSelected = v_data_grid.SelectedCells[0].Item as Resident; Certification c = new Certification(); c.v_name1.Text = $"{rowSelected.FirstName} {rowSelected.MiddleName} {rowSelected.LastName}"; c.v_day.Text = DateTime.Now.Day.ToString(); c.v_month.Text = $"{DateTime.Now.Month} {DateTime.Now.Year}"; c.Show(); }