Check if path is on network

Question

In my app I have a dialog in which the user can select a database backup location.
I want to warn the user if the location he/she selected is "probably not secure".

I want to consider the following locations secure:

1. When selected folder is on a network
   (either by a mapped drive (I:\Backup) or UNC notation(\\server2\backup))
2. When selected folder is on a different physical disk than the database folder

How can I get this kind of info about a selected folder?
I know about the DriveInfo class, but it only handles drive letters, not UNC paths.

Answer 1

Take a look at the PathIsNetworkPath function:

class Program
{
    [DllImport("shlwapi.dll")]
    private static extern bool PathIsNetworkPath(string pszPath);

    static void Main(string[] args)
    {
        Console.WriteLine(PathIsNetworkPath("i:\Backup"));
    }
}