string 数组与 string 求交加

string 数组与 string 求交集
有一个string[] s1={"a","b","c","d","e","ac","ab","bc","ade"}  

和一个string s2="abc";

现在想求这两的交集，结果应该也是个数组 

string s3={"a","b","c","ac","bc"}  

最好能用linq 解答

谢谢
------解决方案--------------------------------------------------------

 string[] s1 = { "a", "b", "c", "d", "e", "ac", "ab", "bc", "ade" };

        string s2 = "abc";

        var s3 = (from q in s1
                  where s2.IndexOf(q) >= 0
                  select q).ToArray<string>();

------解决方案--------------------------------------------------------

            string[] s1 = { "a", "b", "c", "d", "e", "ac", "ab", "bc", "ade" };
            string s2 = "abc";
            string[] vs = s1.Where(v => s2.Contains(v)).ToArray();

------解决方案--------------------------------------------------------
//string s3={"a","b","c","ab","bc"}  //第四个是ab吧？


var ary = s1.Where(v => s2.Contains(v)).ToList();