去重复算法

    /// <summary>
        /// 去重复算法
        /// </summary>
        /// <param name="values"></param>
        /// <returns></returns>
        public static string[] clear(string[] values)
        {
            List<string> item = new List<string>();
            for (int i = 0; i < values.Length; i++)
            {
                bool tre = true;
                for (int j = 0; j < item.Count; j++)
                {
                    if (item[j] == values[i])
                    {
                        tre = false;
                        break;
                    }
               
                }
                if (tre)
                {
                    item.Add(values[i]);
                }
           
            }
            return item.ToArray();
       
       
        }