How to make such an element through the markup?

Question

WPF

I met a video with a design for wpf on yt and saw such an element there and a question arose.
How can it be done through markup?
Here is the video with timecode.
He made this element through markup, is it possible to find the source code for this element? Since I rewrote this code manually and caught an error.
I'll duplicate the time code just in case: 17:29

Answer 1

If it's rough, then there are 3 controls in the grid, a textbox, a textblock and a button.
visible textbox and button. when the button is pressed, the box is hidden and the block is displayed.
everything is beautifully styled.