Try to delete all file coming with filesystemwacther and delete all file created by user.

Hi @MIPAKTEH_1 , Welcome to Microsoft Q&A,

You can try the following code.

• Use FileSystemWatcher to detect file creation and rename events.
• Delete files immediately after detection.
• Handle file locks or exceptions during deletion.
• Ensure that both OnCreated and OnRenamed events result in file deletion.

using System;
using System.Diagnostics;
using System.IO;
using System.Windows.Forms;
namespace Chk_delete
{
    public partial class Form1 : Form
    {
        static readonly string rootFolder = @"C:\Users\sy\Documents\test22";  // Replace with actual folder to monitor
        FileSystemWatcher watcher;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // Initialize FileSystemWatcher
            watcher = new FileSystemWatcher(rootFolder)
            {
                NotifyFilter = NotifyFilters.Attributes
                    | NotifyFilters.CreationTime
                    | NotifyFilters.DirectoryName
                    | NotifyFilters.FileName
                    | NotifyFilters.LastWrite
                    | NotifyFilters.Size,
                Filter = "*.*",  // Monitor all file types
                IncludeSubdirectories = true,
                EnableRaisingEvents = true
            };
            // Hook into events
            watcher.Created += OnCreated;
            watcher.Renamed += OnRenamed;
        }
        // Handle newly created files
        private void OnCreated(object sender, FileSystemEventArgs e)
        {
            try
            {
                // Delete file after it's created
                DeleteFile(e.FullPath);
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"Error while deleting created file: {ex.Message}");
            }
        }
        // Handle renamed files
        private void OnRenamed(object sender, RenamedEventArgs e)
        {
            try
            {
                // Delete renamed file
                DeleteFile(e.FullPath);
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"Error while deleting renamed file: {ex.Message}");
            }
        }
        // Method to delete a file safely
        private void DeleteFile(string filePath)
        {
            if (File.Exists(filePath))
            {
                try
                {
                    // Log file deletion
                    listBox1.Invoke((Action)(() => listBox1.Items.Add($"Deleting file: {filePath}")));
                    // Delete the file
                    File.Delete(filePath);
                    // Log success
                    listBox1.Invoke((Action)(() => listBox1.Items.Add($"File deleted: {filePath}")));
                }
                catch (IOException ioEx)
                {
                    Debug.WriteLine($"IOException: {ioEx.Message} - File may be in use.");
                }
                catch (UnauthorizedAccessException unAuthEx)
                {
                    Debug.WriteLine($"UnauthorizedAccessException: {unAuthEx.Message} - Check permissions.");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine($"Error while deleting file: {ex.Message}");
                }
            }
            else
            {
                Debug.WriteLine($"File not found: {filePath}");
            }
        }
        private static void DisplayException(Exception ex)
        {
            if (ex == null) return;
            Debug.WriteLine($"Message: {ex.Message}");
            Debug.WriteLine("Stacktrace:");
            Debug.WriteLine(ex.StackTrace);
            Debug.WriteLine("");
            DisplayException(ex.InnerException);
        }
    }
}

Best Regards,

Jiale

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