How do I parse a JSON object in C# when I don't know the key in advance?

It's doable; this works but it's not elegant. I'm sure there's a better way.

var o = JObject.Parse(yourJsonString);

foreach (JToken child in o.Children())
{
    foreach (JToken grandChild in child)
    {
        foreach (JToken grandGrandChild in grandChild)
        {
            var property = grandGrandChild as JProperty;

            if (property != null)
            {
                Console.WriteLine(property.Name + ":" + property.Value);
            }
        }
    }
}

Prints:

id:910719
type:asdf
ref_id:7568
id:910721
type:asdf
ref_id:7568
id:910723
type:asdf
ref_id:7568

You can iterate over the child objects with a simple LINQ query like this:

JObject jFoo = JObject.Parse(json);

foreach (JObject obj in jFoo.Properties().Select(p => p.Value))
{
    Console.WriteLine("id: " + obj["id"]);
    Console.WriteLine("type: " + obj["type"]);
    Console.WriteLine("ref_id: " + obj["ref_id"]);
}

Fiddle: https://dotnetfiddle.net/fwINPa

Or if you just want all the ref_id values, you can do something like this:

string[] refIds = jFoo.Properties()
                      .Select(p => (string)p.Value["ref_id"])
                      .ToArray();

Console.Write(string.Join("\r\n", refIds));

Fiddle: https://dotnetfiddle.net/twOuVY

I'm using Json.NET and I wrote a quick way where you can print out all of the keys and corresponding values using a recursive method.

      var o = JObject.Parse(YourJsonString);
      getAllProperties(o); //call our recursive method

Then you can use this recursive method to get all the Properties and their values

   void getAllProperties(JToken children)
    {
        foreach (JToken child in children.Children())
        {
            var property = child as JProperty;
            if (property != null)
            {
                Console.WriteLine(property.Name + " " + property.Value);//print all of the values
            }
            getAllProperties(child);
        }
    }