Best way to check number of occurrences in an int array?

 ok.. like this..
 
 int[] i = { 3, 5, 6, 1, 1, 1, 3, 7 };
 var outval = from ii in i
        group ii by ii into iiGroup
        select new { iiGroup, iiCount = iiGroup.Count() };

 foreach (var item in outval)
 {
        Console.WriteLine(item.iiGroup.Key + " - " + item.iiCount);
 }
        Console.ReadLine();