Delete folder from bit locker throw exception

Question

Delete folder from bit locker throw exception

Dani_S 4,501

Hi,

The exception:

2025-04-08 16:09:51,501 [1] ERROR GssdDesktopClient.Maui.ViewModels.CopyViewModel - DeleteFolderCommandExcute System.IO.IOException: No mapping for the Unicode character exists in the target multi-byte code page. : 'E:\גגגגגגג'. at System.IO.FileSystem.GetFindData(String fullPath, Boolean isDirectory, Boolean ignoreAccessDenied, WIN32_FIND_DATA& findData) at System.IO.FileSystem.RemoveDirectory(String fullPath, Boolean recursive) at System.IO.DirectoryInfo.Delete(Boolean recursive) at GssdDesktopClient.Maui.ViewModels.ViewDevicesViewModel.<>c__DisplayClass95_0.<DeleteFolderCommandExcute>b__0() in C:\Applications\GssdDesktopClient\GssdDesktopClient.Maui\ViewModels\ViewDevicesViewModel.cs:line 1515 at System.Security.Principal.WindowsIdentity.<>c__DisplayClass74_0.<RunImpersonatedInternal>b__0(Object <p0>) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) --- End of stack trace from previous location --- at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Security.Principal.WindowsIdentity.RunImpersonatedInternal(SafeAccessTokenHandle token, Action action) at GssdDesktopClient.Maui.ViewModels.ViewDevicesViewModel.DeleteFolderCommandExcute(Object param) in C:\Applications\GssdDesktopClient\GssdDesktopClient.Maui\ViewModels\ViewDevicesViewModel.cs:line 1499

This is my code:

It happened in fat 32. and happened from times to times. It happened in windows 10 machine. I develope the code in .net 9 on maui. Steps: 1.insert the fat 32. 2.reading the inserted drive. 3.reading the selected path. 4.delete the selected path.

This is my code:

if (Directory.Exists(SelectedSourceItem.Path))

{

var viewDeviceItem = param as ViewDeviceItem;

if (viewDeviceItem != null)

{

var dir = new DirectoryInfo(viewDeviceItem.Path);

dir.Delete(true);

}

@Rob Caplan - MSFT regarding your answer:

Is it your solution using Directory.EnumerateFiles ?

using System;

using System.IO;

class Program

{

static void Main()

{

string directoryPath = @"C:\path\to\your\directory"; // Specify your directory path here

try

{

// Delete all files in the directory

foreach (var file in Directory.EnumerateFiles(directoryPath))

{

File.Delete(file);

}

// Delete all subdirectories in the directory

foreach (var subDirectory in Directory.EnumerateDirectories(directoryPath))

{

Directory.Delete(subDirectory, true); // true to delete subdirectories and files inside them

}

// Delete the directory itself

Directory.Delete(directoryPath, false); // false because we’ve already deleted the contents

Console.WriteLine("Directory and its contents have been deleted.");

}

catch (Exception ex)

{

Console.WriteLine($"An error occurred: {ex.Message}");

}

Rob Caplan - MSFT 6,032 Reputation points Microsoft Employee Moderator

2025-04-08T19:34:16.0066667+00:00
Hi Dani,

I've moved this to a more appropriate forum. There is nothing Maui specific on your call stack. You're more likely to get a useful response if you post under the tag that matches the area you have a problem with, and if you include full information in your initial post about what your code is doing, the environment in which you see the problem (and any in which you don't), what the expected behaviour is, and how that differs from the actual behaviour.

If you need to add information to your post, please edit it into the Question rather than hiding it in comments.

For this question I was able to pick out some information from your call stack, and since I think I know what you're running into I can make assumptions about some others, but it would be much easier if you included it explicitly:

What code is the app running?

What file system is the E drive? Does this affect other drives on the system?

Does this happen always or only sometimes?

What files are affected? Only E:\גגגגגגג? Anything with a Hebrew name? Only items with Hebrew names? Some of each?

Accepted answer

0 additional answers

Your answer

Rob Caplan - MSFT 6,032 Reputation points Microsoft Employee Moderator

2025-04-08T19:34:16.0066667+00:00

Hi Dani,

I've moved this to a more appropriate forum. There is nothing Maui specific on your call stack. You're more likely to get a useful response if you post under the tag that matches the area you have a problem with, and if you include full information in your initial post about what your code is doing, the environment in which you see the problem (and any in which you don't), what the expected behaviour is, and how that differs from the actual behaviour.

If you need to add information to your post, please edit it into the Question rather than hiding it in comments.

For this question I was able to pick out some information from your call stack, and since I think I know what you're running into I can make assumptions about some others, but it would be much easier if you included it explicitly:

What code is the app running?

What file system is the E drive? Does this affect other drives on the system?

Does this happen always or only sometimes?

What files are affected? Only E:\גגגגגגג? Anything with a Hebrew name? Only items with Hebrew names? Some of each?

Answer 1

Rob Caplan - MSFT 6,032 Microsoft Employee Moderator

Assuming that the problem comes when calling System.IO.DirectoryInfo.Delete on a Fat32 formatted drive (I'm guessing an external USB drive or such, and that BitLocker is not relevant), for a Directory (or its contents) with a name that includes non-Latin 1 characters (i.e. Hebrew), you are probably running into https://github.com/dotnet/runtime/issues/64789 (Weird FindFirstFileExW behavior on FAT32 #64789).

As a workaround, per Dan Moseley's comments on that bug Directory.Enumerate will find the file. You could use this to iterate the directory's contents and delete the items individually.

Dani_S 4,501 Reputation points

2025-04-09T06:24:03.82+00:00

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Dani_S 4,501 Reputation points

2025-04-09T06:27:32.91+00:00

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Dani_S 4,501 Reputation points

2025-04-09T16:09:32.5+00:00

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Rob Caplan - MSFT 6,032 Reputation points Microsoft Employee Moderator

2025-04-09T20:24:25.9333333+00:00

If you still need help with this please edit the answers to the questions I asked into your Question rather than losing them in the comment chain.

If you want people to read your code snippets, please format them so they are readable.

If you'd like to work with somebody directly you can open a support ticket at Create a new support request: Developer Tools/.Net/.Net 9.0/Class Library Namespaces/System.IO
Dani_S 4,501 Reputation points

2025-04-09T20:47:43.2166667+00:00

I moved comments to my main question. Can you please verify my solution?
Rob Caplan - MSFT 6,032 Reputation points Microsoft Employee Moderator

2025-04-15T20:21:41.08+00:00

The most straightforward way to verify your solution is to try it in your specific environment. If you need help with it you'll need to edit your question to include more information about the environment and steps in which you find the problem, as I asked in my previous comment.

If you'd like somebody to look over your code please format it so it is readable.

If you'd like somebody to work with you, you can open a support ticket at Create a new support request: Developer Tools/.Net/.Net 9.0/Class Library Namespaces/System.IO
Dani_S 4,501 Reputation points

2025-04-15T22:19:22.67+00:00

I edited the enviirement and steps.
Dani_S 4,501 Reputation points

2025-04-20T08:57:00.6366667+00:00
The bug solved by using Directory.Enumerate:

// Delete all files in the directory

foreach (var file in Directory.EnumerateFiles(viewDeviceItem.Path))

{

File.Delete(file);

}

// Delete all subdirectories in the directory

foreach (var subDirectory in Directory.EnumerateDirectories(viewDeviceItem.Path))

{

Directory.Delete(subDirectory, true); // true to delete subdirectories and files inside them

}

// Delete the directory itself

Directory.Delete(viewDeviceItem.Path, false); // false because we’ve already deleted

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Delete folder from bit locker throw exception

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