Pass click event of child control to the parent control

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While you can interact with parent form directly from child, It’s better to raise some events by child control and subscribe for the events in parent form.

Raise event from Child:

public event EventHandler CloseButtonClicked;
protected virtual void OnCloseButtonClicked(EventArgs e)
{
    CloseButtonClicked.Invoke(this, e);
}
private void CloseButton_Click(object sender, EventArgs e)
{
    //While you can call `this.ParentForm.Close()` but it's better to raise the event
    //Then handle the event in the form and call this.Close()

    OnCloseButtonClicked(e);
}

Note: To raise the XXXX event, that’s enough to invoke the XXXX event delegate; the reason of creating the protected virtual OnXXXX is just to follow the pattern to let the derivers override the method and customize the behavior before/after raising the event.

Subscribe and use event in Parent:

//Subscribe for event using designer or in constructor or form load
this.userControl11.CloseButtonClicked += userControl11_CloseButtonClicked;

//Close the form when you received the notification
private void userControl11_CloseButtonClicked(object sender, EventArgs e)
{
    this.Close();
}

To learn more about events, take a look at:

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