✅ getting all the keys of a json object

The json input I have is:

{
  "vacuum": [],
  "dust": []
}

{
  "vacuum": [],
  "dust": []
}

What I want as output is:

vacuum
dust

vacuum
dust

The json is contained in a JsonObject, and I'm trying to make a method to do what I'm talking about:

    public void List()
    {
        foreach (var key in jsonObj)
        {
            Console.WriteLine(key);
        }
    }

    public void List()
    {
        foreach (var key in jsonObj)
        {
            Console.WriteLine(key);
        }
    }

But the output I'm getting is:

[vacuum, []]
[dust, []]

[vacuum, []]
[dust, []]