internal void Add(Window window)
{
// this method and the Closed event are both run on the main thread
// this means manipulation of the list is safe without locks
window.Closed += (s, e) =>
{
if (windows.Remove(window) && windows.Count == 0)
{
AllWindowsClosed?.Invoke(this, EventArgs.Empty);
}
};
windows.Add(window);
}
/// <summary>
/// Raises <see cref="AllWindowsClosed"/> event.
/// </summary>
private static Task RaiseAllWindowsClosed()
{
return(InvokeOnDispatcherAsync(() => AllWindowsClosed?.Invoke(null, EventArgs.Empty)));
}