Troubleshooting Exceptions: System.UnauthorizedAccessException 

An UnauthorizedAccessException exception is thrown when the operating system denies access because of an I/O error or a security error.

Associated Tips

• Make sure you have sufficient privileges to access this resource.
  For more information, see Code Access Security Basics.

• If you are attempting to access a file or registry key, make sure it is not read-only.
  For more information, see Requesting Permissions.

See Also

Tasks

How to: Find Out More About an Exception with the Exception Assistant
How to: Create a File in Visual Basic
How to: Create a Registry Key and Set Its Values in Visual Basic

Reference

UnauthorizedAccessException