U3D 随机数

1. using System.Security.Cryptographt;
2. using System;
3. 
   
4. byte[] randomBytes = new byte[4];
5. RNGCryptoServiceProvider rngCrypto =
6. new RNGCryptoServiceProvider();
7. rngCrypto.GetBytes(randomBytes);
   
8. 
   
9. int rngNum = BitConverter.ToInt32(randomBytes, 0) % n;//此为随机数

N是范围，用U3D的random太容易出相同数了；