public void getArray()        {            string[] str = new string[] {"1","2","3","4","5" };            List<string> strList = new List<string>();            for (int i = 0; i < str.Length; i++)            {                for (int j = 0; j < str.Length; j++)                {                    strList.Add(str[i] + str[j]);                    //pjh += str[i]+","+str[j];                }            }        }