Why Does File Deletion Fail with 'Access is Denied' Even with Full Control Permissions?

Troubleshooting File Deletion Errors: The "Access Denied" Exception

Deleting a file can sometimes throw an "Access to the path 'path_to_file' is denied" exception, even with seemingly appropriate permissions. This guide helps diagnose the root cause of this common issue. Let's examine the potential reasons behind this File.Delete method failure:

The File.Delete method documentation highlights four key scenarios that trigger an UnauthorizedAccessException:

1. Permission Problems: The user or application lacks sufficient permissions (read, write, and delete) to modify the target file. Verify the user's file system permissions.

2. Executable File in Use: Attempting to delete a running executable file will fail. Terminate any processes using the file before deletion.

3. Incorrect Target: The specified path might point to a directory, not a file. Use Directory.Delete for directory removal; File.Delete is exclusively for files.

4. Read-Only Attribute: If the file is marked read-only, deletion will be blocked. Remove the read-only attribute via file properties before retrying.

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