Keep in mind that you will usually want to let Administrators in too, so if something goes wrong you can fix it without having to be this new user (who may not have other needed permissions to fix the problem). This can be done with Active Directory or plain ol' Windows user accounts. What you could do is set up a user who is the owner of that folder, and the only one that can read/write to it. A program can lock a resource only while it's running. In short, C# alone won't get you what you want. Private void btnUnLock_Click(object sender, EventArgs e)įileSystemAccessRule fsa = new FileSystemAccessRule(adminUserName,FileSystemRights.FullControl, AccessControlType.Deny) String adminUserName = Environment.UserName // getting your adminUserNameĭirectorySecurity ds = Directory.GetAccessControl(folderPath) įileSystemAccessRule fsa = new FileSystemAccessRule(adminUserName, FileSystemRights.FullControl, AccessControlType.Deny)ĭirectory.SetAccessControl(folderPath, ds)

Private void btnLock_Click(object sender, EventArgs e) TextBox1.Text = folderBrowserDialog1.SelectedPath

If (folderBrowserDialog1.ShowDialog() = DialogResult.OK)

Private void btnBrowse_Click(object sender, EventArgs e) The Following code will help to lock and unlock the folder.

Windows 10 how to lock a folder