using System;

using System.Dynamic;

public class Program

{

    public string Test {get; private set;}

    public int Test2 {get; private set;}

    public void TestFunc(dynamic response){

        Test = Convert.ToInt32(response.A);

    }

    public void TestFunc2(ObjectWithString response){

        Test2 = Convert.ToInt32(response.A);

    }

    public class ObjectWithString {

        public string A {get; private set;}

    }

    public static void Main()

    {

        var p = new Program();

        dynamic testObj = new ExpandoObject();

        testObj.A = "3";

        p.TestFunc(testObj);

        var a = new ObjectWithString();

        p.TestFunc2(a);

    }

}