How to raise the ContextMenuOpening event when opening the context menu programmatically

Question

When I open the context menu with <control>.ContextMenu.IsOpen = true, the context menu becomes visible, but the opening or closing events are not triggered.

How can I make sure that the events ContextMenuOpeningand ContextMenuClosingappear when you open the context menu of the software?

---

Demo:

Look at the next XAML

<Button Name="ContextMenuButton" 
        Content="Click me!" 
        Click="ContextMenuButton_Click" 
        ContextMenuOpening="ContextMenuButton_OnContextMenuOpening"
        ContextMenuClosing="ContextMenuButton_OnContextMenuClosing">
    <Button.ContextMenu>
        <ContextMenu>
            <MenuItem Header="First element" />
            <MenuItem Header="Second element" />
        </ContextMenu>
    </Button.ContextMenu>
</Button>

And the following code for

public MainWindow() // Constructor
{
    InitializeComponent();
    ContextMenuButton.ContextMenuOpening += (sender, args) => Debug.Print("Opening #2");
    ContextMenuButton.ContextMenuClosing += (sender, args) => Debug.Print("Closing #2");
}

private void ContextMenuButton_Click(object sender, RoutedEventArgs e)
{
    Button button = (sender as Button);
    button.ContextMenu.IsOpen = true; // How should I open the ContextMenu?
}

private void ContextMenuButton_OnContextMenuOpening(object sender, ContextMenuEventArgs e)
{
    Debug.Print("Opening #1");
}

private void ContextMenuButton_OnContextMenuClosing(object sender, ContextMenuEventArgs e)
{
    Debug.Print("Closing #1");
}

Behavior when right-clicking on a button:

The context menu opens.

Output:

Opening #1
Opening #2
Closing #1
Closing #2

Behavior when left-clicking on a button:

The context menu opens.

Output:

<Nothing>

Answer 1

, ContextMenuOpening Button, ContextMenu ,

, Opened Closed ContextMenu

    public MainWindow() // Constructor
    {
        InitializeComponent();
        ContextMenuButton.ContextMenu.Opened += (sender, args) => Debug.Print("Opening #2");
        ContextMenuButton.ContextMenu.Closed += (sender, args) => Debug.Print("Closing #2");
    }

XAML

    <Button Name="ContextMenuButton" 
            Content="Click me!" 
            Click="ContextMenuButton_Click" >
        <Button.ContextMenu>
            <ContextMenu Opened="ContextMenuButton_OnContextMenuOpening" Closed="ContextMenuButton_OnContextMenuClosing">
                <MenuItem Header="First element" />
                <MenuItem Header="Second element" />
            </ContextMenu>
        </Button.ContextMenu>
    </Button>

, ContextMenuEventArgs RoutedEventArgs

    private void ContextMenuButton_OnContextMenuOpening(object sender, RoutedEventArgs e)
    {
        Debug.Print("Opening #1");
    }

    private void ContextMenuButton_OnContextMenuClosing(object sender, RoutedEventArgs e)
    {
        Debug.Print("Closing #1");
    }

.

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