Hello,
I was working on a task. I tried to edit some Path using Notepad++. When I save and close I couldn’t open main.xaml file. The error was Document is invalid. How can I recover task ?
Thank you
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Hi @y.anilozturk
Can you share more details like posting some screenshots to easily address the issue.Many Thanks.
cheers 
Happy learning
If you have backup then use it, otherwise there is no straight forward way to recover that file.