So , using the command parameter is not needing for this example? If I understand correctly, we can now bind the text of the TextBox to the property in the ViewModel and we just use the value of the property in the handler of the command. Is that right?
I also have a question for those more familiar with Prism than me:
How can I bind a command to the TextChanged event of a TextBox? (instead of the Click of a Button, which is illustrated in the video)