【代码笔记】【c#】根据原始数组返回指定数量的随机元素组成的数组

		/// <summary>
        /// 根据原始数组返回指定数量的随机元素组成的数组
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="arr">原始数组</param>
        /// <param name="arrCount">指定数量</param>
        /// <returns></returns>
        public static T[] ArrayRand<T>(T[] arr, int arrCount = 1)
        {
            if (arrCount > arr.Length)
            {
                arrCount = arr.Length;
            }
            T[] re = new T[arrCount];
            Random ran = new Random();
            for (int i = 0; i < arrCount; i++)
            {
                int r = ran.Next(1, arr.Length);
                re[i] = arr[r - 1];
            }

            return re;
        }