C# WPF - ScrollViewer + TextBlock troubles

Question

I have a TextBlock within a ScrollViewer that aligns with stretch to its window. I need the TextBlock to behave as the following:

Answer 1

Without more detail, the best I can do is provide the standard way of doing this. Basically, host your element (which has a minimum size) in a scroll viewer; when the scrollviewer is resized small enough such that the element cannot wholly fit inside it, it will automatically display scroll bars. Example: