Sorry for the misunderstanding. Indeed you could achieve the desired functionality using a FileReader and Writer to read the text into the file and write it back again.
So, basically you will need to read the text from the file and using some implemented custom logic to create an Appointment from the read Text. Also, when a new Appointment gets created you need to add it to the file using some file writer.
We have created a sample project that demonstrates the described above approach using XamlReader
in order to write the appointments into a .xaml
Please, give it a try and let us know if it worked for you.
Hopes this helps.
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