using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Foo

{

    public string name;

    public Dictionary<string, object> clients;

}

​

public class Program

{

    public static void Main()

    {

        var input = @"{""name"":""test"",""clients"": {""client1"": {""id"": ""1"", ""count"": ""41""},""client2"": {""name"": ""testName""},""client3"": {""CustomerID"": ""a1"", ""internalID"": ""testID""}}}";

        var foo = JsonConvert.DeserializeObject<Foo>(input);

        foreach (var item in foo.clients)

        {

            Console.WriteLine(item.Key);

        }

    }

}