Error - Access To The Path 'C:Check.txt' Is Denied

To write a new file to the hard drive I�ve always used (for example):-

FileOpen(1, "C:FileName.txt", OpenMode.Output)

Trying this today I get an error message� Access to the path 'C:Check.txt' is denied. MSDN say I should use: -

Dim file As System.IO.FileStream
file = System.IO.File.Create("c: est.txt")

So although I couldn�t see how to specify the mode� I tried: -

Dim file As System.IO.FileStream
file = System.IO.File.Create("c:Check.txt")

With exactly the same result� Access to the path 'C:Check.txt' is denied. It says I don�t have permission.