[C#]NextDouble

关键代码：

        /// <summary>

        /// 生成设置范围内的Double的随机数

        /// eg:_random.NextDouble(1.5, 2.5)

        /// </summary>

        /// <param name="random">Random</param>

        /// <param name="miniDouble">生成随机数的最大值</param>

        /// <param name="maxiDouble">生成随机数的最小值</param>

        /// <returns>当Random等于NULL的时候返回0;</returns>

        public static double NextDouble(this Random random, double miniDouble, double maxiDouble)

        {

            if (random != null)

            {

                return random.NextDouble() * (maxiDouble - miniDouble) + miniDouble;

            }

            else

            {

                return 0.0d;

            }

        }

测试代码：

        static void Main(string[] args)

        {

            try

            {

                Random _random = new Random();

                for (int i = 0; i < 10; i++)

                {

                    Console.WriteLine(_random.NextDouble(1.5, 2.5));

                }

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.Message);

            }

            finally

            {

                Console.ReadLine();

            }

        }

测试结果：