public static string GetRandomFileName ()
{
// returns a 8.3 filename (total size 12)
StringBuilder sb = new StringBuilder (12);
// using strong crypto but without creating the file
RandomNumberGenerator rng = RandomNumberGenerator.Create ();
byte [] buffer = new byte [11];
rng.GetBytes (buffer);
for (int i = 0; i < buffer.Length; i++) {
if (sb.Length == 8)
sb.Append ('.');
// restrict to length of range [a..z0..9]
int b = (buffer [i] % 36);
char c = (char) (b < 26 ? (b + 'a') : (b - 26 + '0'));
sb.Append (c);
}
return sb.ToString ();
}
#endif
