I am getting System.Collections.Generic.List`1[ConsoleApp1.Program.Employee] instead of the list's contents? c#

Question

class Employee
      {
         public string Name{get;set;}
         public int Age{get;set;}
         public int ID{get;set;}
      }

      static void Main(string[] args)
      {
        List<Employee> EmployeeList = new();

        EmployeeList.Add(new Employee() { Name = "Luís", Age = 19, ID = 1 });
        EmployeeList.Add(new Employee() { Name = "Sofia", Age = 25, ID = 2 });
        EmployeeList.Add(new Employee() { Name = "Gilberto", Age = 57, ID = 3 });
        EmployeeList.Add(new Employee() { Name = "Manuel", Age = 25, ID = 4 });
        EmployeeList.Add(new Employee() { Name = "Sofia", Age = 25, ID = 2 });


        var EmployeeDic = EmployeeList.GroupBy(i => i.Age).ToDictionary(gdc => gdc.Key, gdc => gdc.ToList());
        
        foreach (var emp in EmployeeDic)
        {
                Console.WriteLine("" + emp.Key + emp.Value);
        }
        Console.ReadKey();}

I have done a lot of research and I can't get the value, just the key that is the age of the employees. What can I try next?

Answer 1

var EmployeeDic = EmployeeList.GroupBy(i => i.Age).ToDictionary(gdc => gdc.Key, gdc => gdc.ToList());

That line creates lists of employees by age. Specifically a list of employees aged 19, then another list of employees aged 25, then finally a list of employees aged 57.

foreach (var emp in EmployeeDic)

That line loops through the lists.

Console.WriteLine("" + emp.Key + emp.Value);

That line then outputs information about the list. This is not the intended behaviour of the code, so consequently the output is not helpful.

---

The solution is to keep the code which loops around the lists, but then have another loop within that, which loops through each employee within that list.

Like so: (replace your loop with this)

foreach (var empList in EmployeeDic)
{
    Console.WriteLine("Age {0}", empList.Key);
    foreach (var emp in empList.Value)
    {
        Console.WriteLine("\t{0} has an ID of {1}", emp.Name, emp.ID);
    }
}

The output of that is: