private void button1_Click(object sender, EventArgs e) { Administration admin = new Administration(); admin.Login = tb_login.Text; admin.Password = tb_password.Text; admin.FullName = tb_fullName.Text; admin.YearOfBirth = tb_yearOfBirth.Text; admin.Position = tb_position.Text; admin.Salary = tb_salary.Text; ExcelService excel = new ExcelService(); string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal) + "\\Information System For Car Service\\Information System.xls"; excel.OpenDocument(path); excel.WriteDataAdministration(admin); excel.CloseDocument(); this.Close(); }