Getting free space for a folder with a quota

[Greg99]

Hello. I need to find the available space for a given path (could be a network path) with a quota applied, but when I use the following code, it gives me the available space on the entire drive. For instance, I have a drive E: that has 500 GB of available space. But I have user folders on this drive and each user has a 2 GB quota. For instance, when I use this function giving the path "E:\Users\Greg", it should return that 2 GB is free, but instead it returns 500 GB. I have verified that the quota is working in that it does not allow me to create more than 2 GB of files in that directory. Does anyone have a solution to this problem? Any help is greatly appreciated. Using C#.

using System;
using System.IO;
using System.Reflection;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
 
public class MainClass
{
    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
       out ulong lpFreeBytesAvailable,
       out ulong lpTotalNumberOfBytes,
       out ulong lpTotalNumberOfFreeBytes);
    public static long getFreeSpace(string path)
    {
        ulong freeBytesAvail;
        ulong totalNumOfBytes;
        ulong totalNumOfFreeBytes;
 
        if (!GetDiskFreeSpaceEx(path, out freeBytesAvail, out totalNumOfBytes, out totalNumOfFreeBytes))
        {
            Console.Error.WriteLine("Error occurred: {0}",
                Marshal.GetExceptionForHR(Marshal.GetLastWin32Error()).Message);
            return 0;
        }
        else
        {
            return Convert.toInt64(freeBytesAvail / (1024 * 1024));
        }
    }
}
 

[Plater]

Quotas I don't think are part of the normal filesystem. You might be able to access them via a WMI call, but I don't know much more about it.