数组重复项的问题

[funlive]

我有这样一个数组
Person[] persons = new Person[4];
persons[0] = new Person() { Id = 1, Name = "Test1", Count = 2 };
persons[1] = new Person() { Id = 2, Name = "Test2", Count = 2 };
persons[2] = new Person() { Id = 1, Name = "Test1", Count = 2 };
persons[3] = new Person() { Id = 3, Name = "Test3", Count = 2 };

重复项是指：ID 和 Name 相同，比如 persons[0] 和 persons[2]
然后把重复项的结果累加

比如，上边的结果是得到一个新的数组，Person[3];
persons[0] = new Person() { Id = 1, Name = "Test1", Count = 4 };
persons[1] = new Person() { Id = 2, Name = "Test2", Count = 2 };
persons[2] = new Person() { Id = 3, Name = "Test3", Count = 2 };

我现在用一个一个比较的方法做的，总感觉效率不高

请问大家有什么好的方法


谢谢了

[人生难得一只鸡]

 Person[] persons = new Person[4];
                persons[0] = new Person() { Id = 1, Name = "Test1", Count = 2 };
                persons[1] = new Person() { Id = 2, Name = "Test2", Count = 2 };
                persons[2] = new Person() { Id = 1, Name = "Test1", Count = 2 };
                persons[3] = new Person() { Id = 3, Name = "Test3", Count = 2 };


                persons=persons.GroupBy(a => new { a.Id, a.Name }).Select(a => new Person()
                {
                    Id=a.Key.Id,
                    Name=a.Key.Name,
                    Count=a.Sum(b=>b.Count)
                }).ToArray();