C#利用时间和随即字符串创建唯一的订单编号

private static string GetUniqueKey(){  int maxSize = 8;  int minSize = 5;  char[] chars = new char[62];  string a;  a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";  chars = a.ToCharArray();  int size = maxSize;  byte[] data = new byte[1];  RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider();  crypto.GetNonZeroBytes(data);  size = maxSize;  data = new byte[size];  crypto.GetNonZeroBytes(data);  StringBuilder result = new StringBuilder(size);  foreach (byte b in data)  {    result.Append(chars[b % (chars.Length - 1)]);  }  return result.ToString();}

for (int i = 0; i < 10; i++){  string str = string.Format("{0}{1}", DateTime.Now.ToString("yyyyMMddHHmmss"), GetUniqueKey());  Console.WriteLine(str);}Console.ReadKey();