Cannot save a file in my app

Unity Engine
1

Hello,

until now I was using the Binaryformatter but that did not work with Unity UWP so I switched to XML.

I have a List with a struct in it and want to save it to a file to load it next App start on my hololens.
I do not care where the file is, just want to save and load it.

The saving does not seem to work on the hololens (release build).
I tried LocalFolder and RoamingFolder, both do not work.

Where or how can I save my List?

Thanks a lot for your help!

Code:

    public static void SaveQRList(string nameList)
    {
        try
        {
#if WINDOWS_UWP
            //StorageFolder storageFolder = ApplicationData.Current.LocalFolder;
            StorageFolder storageFolder = ApplicationData.Current.RoamingFolder;
            nameList = storageFolder + "\\" + nameList;
#endif
            //Speichern
            Stream stream = File.Open(nameList, FileMode.Create);
            //BinaryFormatter writer = new BinaryFormatter();
            XmlSerializer writer = new XmlSerializer(QRCodesList.GetType());
            Debug.Log("Writing Containers");
            writer.Serialize(stream, QRCodesList);
            //stream.Close();
            Debug.Log("Write CodeList finished");
        }
        catch (System.Exception ex)
        {
            Debug.LogError("Save CodeList List Error: " + ex.ToString());
        }
    }

Error when saving:

‘LR Worlds.exe’ (CoreCLR: CoreCLR_UWP_Domain): Loaded ‘C:\Data\Users\DefaultAccount\AppData\Local\DevelopmentFiles\LRWorldsVS.Release_x86.beh\System.Xml.XmlSerializer.dll’. Cannot find or open the PDB file.
‘LR Worlds.exe’ (CoreCLR: CoreCLR_UWP_Domain): Loaded ‘C:\Data\Users\DefaultAccount\AppData\Local\DevelopmentFiles\LRWorldsVS.Release_x86.beh\System.Resources.ResourceManager.dll’. Module was built without symbols.
Exception thrown: ‘System.IO.DirectoryNotFoundException’ in System.IO.FileSystem.dll
Save CodeList List Error: System.IO.DirectoryNotFoundException: Could not find a part of the path ‘C:\Data\Users\DefaultAccount\AppData\Local\DevelopmentFiles\LRWorldsVS.Release_x86.beh\Windows.Storage.StorageFolder\QRCodesList.ser’.
at System.IO.Win32FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs)
at System.IO.Win32FileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
at System.IO.MultiplexingWin32WinRTFileSystem.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, FileStream parent)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
at Globals.SaveQRList(String nameList)

2

I found a path that works:

nameList = Application.persistentDataPath + “\” + nameList;

Thanks! Solved.

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