using System;

using System.Reflection;

using System.Linq.Expressions;

public class Program

{

    public static void Main()

    {

        C obj = new C();

        obj.objB = new B();

        obj.objB.objA = new A(){ Valor = "Valor de A" };

        string y = Teste.ObterValorExp(obj, "objB.objA.Valor");

        Console.WriteLine("Valor: "+ y);

    }

}

​

public static class Teste

{

    public static string ObterValorExp(object obj, string prop)

    {

        string[] props = prop.Split('.');

        Expression exp = Expression.Property(Expression.Constant(obj), props[0]);

​

        for (int i = 1; i < props.Length; i++)

        {

              exp = Expression.Property(exp, props[i]);

        }

​

        return Expression.Lambda<Func<string>>(exp).Compile()();

    }

}

​

​

​

public class A

{

    public string Valor {get;set;}

}

​

public class B

{

    public A objA {get;set;}

}

​

public class C

{

    public B objB {get;set;}

}