Display Exceptions in Windows 8

wrapException.cs

        private async void showPotentialException(Func<System.Threading.Tasks.Task> a)
        {
            string message = null;
            try
            {
                await a();
            }
            catch (Exception ex)
            {
                message = ex.Message;
            }

            if (message != null)
            {
                var dialog = new MessageDialog(message);
                dialog.Commands.Add(new UICommand("OK"));
                await dialog.ShowAsync();
            }
        }