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# Astuces WPF

## Timer

```csharp
private void Button_Click(object sender, RoutedEventArgs e)
{
    System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
    dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
    dispatcherTimer.Interval = TimeSpan.FromMilliseconds(20);;
    dispatcherTimer.Start();
}
```

```csharp
private void dispatcherTimer_Tick(object sender, EventArgs e)
{
    this.runCycleApi();
}
```