这个类主要扩展的random的使用，对一个经常需要使用的随机数生成进行了封装，可以产生指定范围内的随机数，可以随机生成字符串等

//------------------------------------------------------------
// All Rights Reserved , Copyright (C) 2010 , Jirisoft , Ltd.
//------------------------------------------------------------
 
using System;
 
namespace DotNet.Utilities
{
    /// <summary>
    /// BaseRandom
    /// 产生随机数
    ///
    /// 随机数管理，最大值、最小值可以自己进行设定。
    /// </summary>
    public class BaseRandom
    {
        public static int Minimum = 100000;
        public static int Maximal = 999999;
        public static int RandomLength = 6;
 
        private static string RandomString = "0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZ";
        private static Random Random = new Random(DateTime.Now.Second);
 
        #region public static string GetRandomString() 产生随机字符
        /// <summary>
        /// 产生随机字符
        /// </summary>
        /// <returns>字符串</returns>
        public static string GetRandomString()
        {
            string returnValue = string.Empty;
            for (int i = 0; i < RandomLength; i++)
            {
                int r = Random.Next(0, RandomString.Length - 1);
                returnValue += RandomString[r];
            }
            return returnValue;
        }
        #endregion
 
        #region public static int GetRandom()
        /// <summary>
        /// 产生随机数
        /// </summary>
        /// <returns>随机数</returns>
        public static int GetRandom()
        {
            return Random.Next(Minimum, Maximal);
        }
        #endregion
 
        #region public static int GetRandom(int minimum, int maximal)
        /// <summary>
        /// 产生随机数
        /// </summary>
        /// <param name="minimum">最小值</param>
        /// <param name="maximal">最大值</param>
        /// <returns>随机数</returns>
        public static int GetRandom(int minimum, int maximal)
        {
            return Random.Next(minimum, maximal);
        }
        #endregion
    }
}