How to open and close an instance of powerpoint in C#

Here is what I did for the Word App:

using wd = Microsoft.Office.Interop.Word;

    wd.Application wdApp = new wd.Application();
    wdApp.Visible = true;

    ((wd.ApplicationEvents4_Event)wdApp).Quit += () => { MessageBox.Show("Exited!"); };

And here is what I did for the Powerpoint App:

using wd = Microsoft.Office.Interop.PowerPoint;

    wd.Application wdApp = new wd.Application();
    wdApp.Visible = true;

    ((wd.ApplicationEvents4_Event)wdApp).Quit += () => { MessageBox.Show("Exited!"); };

But  the error I got is that it doesn't recognize this: "ApplicationEvents4_Event"...

Thank you.