Creating a file and saving it to C

[C# Programming]

End Google Ads 201810 - BS.net 01 --> I am trying to create a simple text file and save it to C as:

File.Create(C:/Points.txt)

I am getting this error:

System.UnauthorizedAccessException was unhandled
Message="Access to the path 'C:\\Points.txt' is denied."
Source="mscorlib"
StackTrace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, etc.

Can anyone tell me why? Its my computer and I am the sole user and administrator.

Thanks