SpecialFolder.ApplicationData under Windows CE 5.0

[Coralino]

Hello

I am new to C#. I try to create a Game on a Windows CE 5.0 mobile device using VisualStudio 2008 and .net 3.5 on a Windows10 64bit computer.

I try to load and save data from csv-file. As Windows CE 5.0 does not have C:\ i try to acces the folder with 'Enviroment.SpecialFolder.ApplicationData'

My actual problem is that on the device it is working, but not in Debug.

What I did try is:
I have on the device the mu001.exe that is in the ApplicationFolder called BACKUP where the TestFile.csv will be created.
on my windows10 I did create the folder C:\Users\Admin\AppData\Roaming\Wonderland\BACKUP

The code is i tried is:

var filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), @"Wonderland\BACKUP\TestFile.csv");
StreamWriter writer;
string str = "Test-Text";
 
using (writer = File.AppendText(filePath))
{
writer.WriteLine(str);
writer.Close();
}

on the device it is creating the csv-file next to the exe but while debug-mode it gives the error Could not find a part of the path '\Application Data\Wonderland\BACKUP\TestFile.csv'.

what do i do wrong?

[Arjay]

Check the return of GetFolderPath. If it's empty, get the path to the application.