c# winform 完全退出系统

DialogResult dialogResult = MessageBox.Show("是否确认退出系统?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
if (dialogResult == DialogResult.Yes)
{
    //Frm_Log.Instantiation.OutputMsg(DateTime.Now.ToString() + "退出系统", Color.Green);
    System.Diagnostics.Process.GetCurrentProcess().Kill();
}