How to allow for multiple popups at once in WinRT?

Question

If you call the ShowAsync command on a MessageDialog object when another MessageDialog object has already been displayed to the user b

Answer 1

You can easy do it with this extension method:

public static class MessageDialogShower
{
    private static SemaphoreSlim _semaphore;

    static MessageDialogShower()
    {
        _semaphore = new SemaphoreSlim(1);
    }

    public static async Task ShowDialogSafely(this MessageDialog dialog)
    {
        await _semaphore.WaitAsync();
        var result = await dialog.ShowAsync();
        _semaphore.Release();
        return result;
    }
}