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var dir = Environment.GetExternalStoragePublicDirectory(Environment.DirectoryPictures);  
var files = Directory.GetFiles(dir.AbsolutePath, "*");
var path = Android.App.Application.Context.GetExternalFilesDir(null);
var cache = Android.App.Application.Context.GetExternalCacheDirs().First().AbsolutePath;

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// Get the full path of the app executable
string location = Assembly.GetExecutingAssembly().Location;
// Get the directory of the app
var localDir = Path.GetDirectoryName(location);
if (Directory.Exists(localDir))
{
    // Get a list of subdirectories
    var dir = Directory.GetDirectories(localDir);
    //foreach (var item in dir)
    {
        var ffs = Directory.GetFiles(dir.Last());
        ffs = Directory.GetFiles(dir.First());
        ffs = Directory.GetFiles(FileSystem.Current.AppDataDirectory);
    }
    // Get a list of subdirectories in the app directory "/data/user/0/com.companyname.mauiapp2/files"
    var fs = Directory.GetDirectories(FileSystem.Current.AppDataDirectory);
    foreach (var item in fs)
    {
        var ffs = Directory.GetFiles(item);
    }
    var files = Directory.GetFiles(localDir);
    List<string> list = new List<string>();
    string ss = "";
    foreach (var file in files)
    {
        var f = Path.GetFileName(file);
        list.Add($"{f}");
    }
    foreach (var item in list.Order())
    {
        ss += $"{item}\r\n";
    };
    s = JsonSerializer.Serialize(list);
}