using System;

using System.Linq;

using Newtonsoft.Json.Linq;

using System.Collections.Generic;

​

public class Program

{

    public class VarObject

    {

        public string SomeValue {get;set;}  

    }

    public static void Main()

    {

        var jsonText = "{  \"starttime\": \"...\",    \"endtime\": \"....\",  \"var1\": {\"SomeValue\":\"String1\"}, \"var2\": {\"SomeValue\":\"String2\"}  }";

        var jObj = JObject.Parse(jsonText);

        var varData = jObj

            .Children<JProperty>()

            .Where(p => p.Name  != "starttime" && p.Name  != "endtime")

            .ToDictionary(x=> x.Name, x => ((JObject)x.Value).ToObject<VarObject>());

        int i = 0;

        foreach(var item in varData)

        {

            Console.WriteLine("Item (" + item.Key + ") readed with SomeValue: "+ item.Value.SomeValue );

        }

    }

}