public void Execute(object sender)
{
var rea = new MainWindowClosingEventArgs();
rea.DockMgr = (DockingManager)sender;
OnApplicationClosing(rea);
}
protected virtual void OnApplicationClosing(MainWindowClosingEventArgs e)
{
var Handler = ApplicationClosing;
if (Handler != null)
{
Handler(this, e);
}
}
