How to write a file in WPF for Windows Screen Saver

Question

I developed a custom screen saver in WPF (with the extension .scr) but I got an issue : When screen saver is run by Windows, the application stop imediately. After some tests, I found that it comes from the fact that I'm creating/writing files.

I tried :

• to add a manifest to run as administrator
• name my file with 8 characters + 3 for extension
• write my file in different location ("C:\", "C:\Windows", "C:\Program Files (x86)",...)

But nothing works...

Any idea ?

Note : I need to write lot of lines in my file

Answer 1

Ok, my bad... I found where were my problemss.

First, screen saver does not have permission to write in Windows folder.

Then, I was trying to write in a special folder using Environment.SpecialFolder.MyDocuments but this property return the name of the folder. So I need to use Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) instead.

Finally, I was trying to write a file in a folder that didn't exists. I thought that the folder would be created automatically but I was wrong...

As suggested by @elgonzo, I have added exception handler and displayed the error messages in a message box using MessageBox.Show(log).