WPF没有双击事件

//WPF模拟双击事件
int i = 0;
private void button1_Click(object sender, RoutedEventArgs e)
{
??? i += 1;
??? System.Timers.Timer t = new System.Timers.Timer(600);
??? t.Interval = 600;
?????????
??? t.Elapsed += (s, ee) => { t.Enabled = false; i = 0; };
??? t.Enabled = true;
??? if (i % 2 == 0)
??? {
???????? t.Enabled = false;
???????? MessageBox.Show("双击");
???????? i = 0;
???? }
}