toolbox

In my app the contents of a file is displayed in a TextBlock with ScrollViewer, as you can select each item from the TextBlock and edit it, delete it, and then save the file?

if it is not properly a TextBlock or textbox as a tool to display / select / edit each line as a tool I can use?

I've done the APP that does everything above but divided into multiple pages, with the search for the exact text to be edited etc etc ... I would make sure when you see the contents of the file if necessary, select the items to change the TextBlock or other instrument .... so do not search for text in the file to another page ...

I hope I was clear enough. Thank you