public static extern bool FtpRemoveDirectory(IntPtr ulSession, string lpszDirectory);

Declare Function FtpRemoveDirectory Lib "wininet.dll" (TODO) As TODO

static extern bool RemoveDirectory(string lpPathName);

    internal static extern bool RemoveDirectory(string lpPathName);

        if (!NativeMethods.RemoveDirectory(normalizedPath))

  RemoveDirectory(path);

public static extern int CeRemoveDirectory(string lpPathName);

CeRemoveDirectory("\\temp")