using System;

using Newtonsoft.Json; 

using Newtonsoft.Json.Linq;

​

​

public class Program

{

    public static void Main()

    {

         //I have 2 json to merge

         var json = @"{'client': {'name': 'Should NO CHANGE', 'lastname': '', 'email': 'asd@asd.com', 'phone': '', 

                                    'birthday': '', 'married': false, 'spouse': {'name': '', 'lastname': ''} } }

                ";

​

         var json2 = @" {'client': {'name': 'aaaa', 'lastname': 'bbbb', 'email': 'cccccc@ccccc.com', 

                                            'phone': '', 'birthday': '', 'married': false, 

                                            'spouse': {'name': 'dddddd', 'lastname': 'eeeee'} } } ";

        //for example to properties to replace

        var path = "client.spouse";

        var path2 = "client.email";

​

        dynamic o1 = JObject.Parse(json);

        dynamic o2 = JObject.Parse(json2);

        //I want this, but using the string

        o1.client.spouse = o2.client.spouse;

        o1.client.email = o2.client.email; 

         Console.WriteLine(o1 );

    }

}