对int数组进行从大到小的排序,并去除重复项

static void Main(string[] args)   
{   
    int[] xx = { 1, 4, 4, 4, 6, 6, 8, 76, 7, 4 };   
    List<int> l = xx.ToList<int>();   
    l.Sort();   
  
    var query = (from q in l   
                 select q).Distinct();   
  
    for (int i = query.Count() - 1; i > 0; i--)   
    {   
        Console.Write(query.ElementAt(i) + " , ");   
    }   
  
    Console.Read();   
}