System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 15, position 1. about reddit-wallpaper-changer HOT 3 CLOSED

Hmm, it sounds like the config file has corrupted somehow (looks like it contains 0x00 which is a NUL character).

Close the app and try using a text editor to alter the Reddit Wallpaper Changer.exe.config file, delete and retype lines 14-16 manually, if you have a text editor like Notepad++ installed it can show non-printable characters so you can find and delete the NUL character.

Otherwise, close the app and delete the Reddit Wallpaper Changer.exe.config file, then restart the app and see if it gets regenerated correctly.

If that doesn't work, try re-downloading the installer from Github again, uninstall the app, delete any app folders (e.g. AppData/Reddit Wallpaper Changer), then reinstall

Let me know if that helps. If you're still having issues, upload your Reddit Wallpaper Changer.exe.config somewhere (e.g. pastebin) and paste the link. Also upload the logs (if there are any)

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I think I have it figured out... A bit of a strange one I guess. First I tried running RWC in Windows Sandbox, which obviously worked fine. After this I figured to have a look with Procmon and noticed the C:\Users\%USERPROFILE%\AppData\Local\_u_qwertydog\Reddit_Wallpaper_Changer._Url_fn5rdr3tbrupllitik0y5clty5pa2qfl\1.0.20.0 path being read.. In the path there was only a single file:

user.config with:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <userSettings>
        <Reddit_Wallpaper_Changer.Properties.Settings>
            <setting name="AppDataPath" serializeAs="String">
                <value>C:\Users\<username>\AppData\Roaming\Reddit Wallpaper Changer</value>
            </setting>
        </Reddit_Wallpaper_Changer.Properties.Settings>
    </userSettings>
</configuration>

I figured to delete the folder 1.0.20.0, however the problem persisted. The same folder contains folders for older RWC installs from 1.0.15.0 through 1.0.19.0. Only after renaming the whole folder Reddit_Wallpaper_Changer._Url_fn5rdr3tbrupllitik0y5clty5pa2qfl did RWC start normally...

Finally I dug a little deeper and figured out that renaming the previous version's folder 1.0.19.0 I could make RWC start normally. This is where I found the issue... The previous version's user.config had line full of NUL (5400 of them to be exact...) It is still a bit weird since Procmon doesn't appear to show that RWC is actually even trying to read this file.. Only the user.config of v. 1.0.20.0 is being read. Deleting/renaming 1.0.19.0 apparently made RWC to restore settings from 1.0.18.0 regardless. Go figure!

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Huh that's a weird one

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