arraylist数组字符串连接问题，求高手！
arraylist类型 arrayLianHao数组中的元素{ "02", "12", "23", "33", "43", "52" }，两两连接，并去掉重复的字符，如：元素1和元素2相连，“0212”，删除重复字符后为012；元素1和元素2相连，“0223”，删除重复字符后为023；然后元素1和3，1和4,1和5,1和6,2和3，2和4，2和5,2和6,3和4……。得到的删除重复字符的字符串放在arrayLianHao1中，
问题：
所写程序可连接字符串，但不能删除重复字符
代码如下：


ArrayList arrayLianHao = new ArrayList();
string [] number = { "02", "12", "23", "33", "43", "52" };
arrayLianHao.AddRange(number);
ArrayList arrayLianHao1 = new ArrayList();
int q = 0;
for (int i = 0; i < 5; i++)
{
for (int j = i + 1; (j < 6) && (q < 15); j++, q++)
{
foreach (char c in arrayLianHao[i]) { if ((arrayLianHao[j].ToString()).IndexOf(c) >= 0) { (arrayLianHao[j].ToString()).Replace(c.ToString(),""); } }

string xinzifu = arrayLianHao[i].ToString() + arrayLianHao[j].ToString();
arrayLianHao1.Add(xinzifu);
}
}

恳请高手解决！！！

[解决办法]

C# code

string[] number = { "02", "12", "23", "33", "43", "52" };ArrayList arrayLianHao = new ArrayList();var query = from x in number            from y in number            select new string((x + y).Distinct().ToArray());foreach (string s in query){    arrayLianHao.Add(s);}