System.IO.File does not contain a definition for 'Move'

Could anyone help me with this?
So I am using the File.Move but the error pops up when I try to upload it to web player. However, before I did so, everything works just fine. There was no error when it plays before I built it to web player. What is going on? Is there anyway that I can fix it because the ultimate goal is to upload it to the web verision so I am considering about using another method to make the same result or anything anybody could suggest?

Thanks so much for help!

 

have you checked that you have the correct access on web server. Why not try the Copy and then Delete, if this works then it is probably something more complex.

 

No system access in webplayer
http://docs.unity3d.com/Manual/SecuritySandbox.html

 

It is said that system.IO and system.DATA cannot be used in the web player. Is that true? If so, the whole data structure needs to be changed?

 

I see. Anyway to fix the problem tho?

 

Rewrite the Webplayer code (ie. No)

For webplayers, you should not need disk access. If you want to save a game, use PlayerPrefs
If you need disk access, for non-game utilities, go standalone