C# :: Mapped Network Drive - Deleting Or Moving A File

Currently I'm trying to do something extremely basic: delete or move a file

I have a mapped network drive (Y) where I have a file I need to move from one folder to another

First was doing the obvious:

System.IO.File.Move("Y:TempFile.txt", "Y:Temp2File.txt");

Not much to go wrong here, right? As long as I have the correct permission to write in the folders and the folders exists, this would normally go smooth. But for some reason it only copies the file. The source file still exists, but it has successfully copied the file to the destination folder. No exceptions has been thrown or anything... but the file still exists in the source directory

I then changed the code to the following:

System.IO.File.Copy("Y:TempFile.txt", "Y:Temp2File.txt");
System.IO.File.Delete("Y:TempFile.txt");
Console.WriteLine("See mommy, no Exceptions");

As expected the file copies correctly, but the delete command is completely ignored. The file is not deleted, but the Console.WriteLine command is called

I'm running the application as the logged in user. The user has permission to delete the file. If I try from Windows Explorer, the file is correctly deleted. Unfortunately my application refuses to delete the file and even worse, it will not even throw an Exception.