How can you get a XAML TextBlock to collapse when it contains no data?

Question

I want to tell WPF: \"If TextBlock contains no data, then don\'t show it.\"

TRY #1 with a simple trigger produces

Answer 1

I think the simplest way to do this would be to define a Converter which converts string to visibility.

   ...

   return string.IsNullOrEmpty(s) ? Visibility.Collapsed : Visibility.Visible;
}

Then just