C# 生成随机数的代码

/// 构造随机数 种子static int GetRandomSeed(){      byte[] bytes = new byte[4];      System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider();      rng.GetBytes(bytes);      return BitConverter.ToInt32(bytes, 0);}  /// 生成随机 数static int rnd() {            Random ran = new Random(GetRandomSeed());           int cnt = ran.Next(0,59);      return cnt; }