C# 随机打乱数组

把
电子磅秤，1吨电子磅秤，2吨电子磅秤，3吨电子磅秤
改成
1吨电子磅秤，3吨电子磅秤，2吨电子磅秤，电子磅秤

private void button1_Click(object sender, EventArgs e)
        {
            string strArr = txtSource.Text.Trim();
            string[] SourceStr= strArr.Split(new char[2] { ',', '，' }); //支持中英文逗号
            string[] NewStr = RandomSort(SourceStr);
             string strResult="";
             for (int i = 0; i < NewStr.Length; i++)
             {
                 if (i == NewStr.Length - 1)
                 {
                     strResult += NewStr[i];
                 }

                 else
                 {
                     strResult += NewStr[i]+",";
                 }
             }
             txtNew.Text = strResult;  

        }

        public static T[] RandomSort<T>(T[] array)
        {
            int len = array.Length;
            System.Collections.Generic.List<int> list = new System.Collections.Generic.List<int>();
            T[] ret = new T[len];
            Random rand = new Random();
            int i = 0;
            while (list.Count < len)
            {
                int iter = rand.Next(0, len);
                if (!list.Contains(iter))
                {
                    list.Add(iter);
                    ret[i] = array[iter];
                    i++;
                }

            }
            return ret;
        }