** EDIT **

Am I wrong in assuming that I can't copy files across different drives? So I want to copy files from a DVD to my C:\??? Just tried the same code using the same drive and it worked but different drives it throws a paddy???

** EDIT AGAIN **

I can't seem to copy files off a DVD to my desktop based on using an App.. I get the error invalid function. Am I wrong in assuming this?

What is a "paddy"?  Document your problem better.  Post the exception message, its stack trace and a snippet of your code.

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Hans Passant.

I am trying to copy files from a DVD at the moment but the File.CopyTo() doesn't seem to work. It triggers an exception "invalid operation". Found that I don't believe I can copy from a DVD to my HDD. Tried my same code to copy files from my C:\ to E:\ and it worked.

I thought I was able to do this but its fine.

is the DVD a video DVD or a data DVD?  video dvds are going to be a problem, but data dvds I would expect to work just fine as a source.