parent and child through json in asp.net mvc-hierarchy

Question

sending list with name and value in json can be done with

 public ActionResult Index()
        {
     return Json(new { firstName= "John",lastName= "Doe" });
}

but when i want to have hierarchy structure for json using list and foreign key , name of parent will be empty and child become child of parent exactly , what is the best way to implement parent/child for json ?

Update: {

"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
}

employe is parent and has no value. it is just name of parent , how implement in C# ?

Answer 1

new { 
    Employees = 
           {
                new { firstName= "John", lastName= "Doe" }, 
                new { firstName= "John2",lastName= "Doe2" },
                new { firstName= "John3",lastName= "Doe3" }
           }
    }