这是一个c#工具类，用于产生随机整数，随机字符串，随机颜色等，同时你可以对这个类进行扩展，产生自己的随机数据

/// <summary>      /// Helper class for generating random values      /// </summary>      public static class RandomHelper      {          private static Random randomSeed = new Random();            /// <summary>          /// Generates a random string with the given length          /// </summary>          /// <param name="size">Size of the string</param>          /// <param name="lowerCase">If true, generate lowercase string</param>          /// <returns>Random string</returns>          public static string RandomString(int size, bool lowerCase)          {              // StringBuilder is faster than using strings (+=)              StringBuilder RandStr = new StringBuilder(size);                // Ascii start position (65 = A / 97 = a)              int Start = (lowerCase) ? 97 : 65;                // Add random chars              for (int i = 0; i < size; i++)                  RandStr.Append((char)(26 * randomSeed.NextDouble() + Start));                return RandStr.ToString();          }            /// <summary>          /// Returns a random number.          /// </summary>          /// <param name="min">Minimal result</param>          /// <param name="max">Maximal result</param>          /// <returns>Random number</returns>          public static int RandomNumber(int Minimal, int Maximal)          {              return randomSeed.Next(Minimal, Maximal);          }            /// <summary>          /// Returns a random boolean value          /// </summary>          /// <returns>Random boolean value</returns>          public static bool RandomBool()          {              return (randomSeed.NextDouble() > 0.5);          }            /// <summary>          /// Returns a random color          /// </summary>          /// <returns></returns>          public static System.Drawing.Color RandomColor()          {              return System.Drawing.Color.FromArgb(                  randomSeed.Next(256),                   randomSeed.Next(256),                   randomSeed.Next(256)              );          }        }    //使用范例：  // Generate a random word:  string RandomWord = RandomHelper.RandomString(10, true);    // Generate a random number:  int Number = RandomHelper.RandomNumber(0, 10);    // Generate a random boolean value:  bool Active = RandomHelper.RandomBool();    // Generate a random color:  Color Background = RandomHelper.RandomColor();