using System;

using System.Linq;

using System.Linq.Expressions;

using System.Collections.Generic;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        Customer customer = null;

        //string expressionAdressNumber = Program.PathString(() => customer.Adress.Number);

        //Console.WriteLine("Correct - Expected: Adress.Number, Actual: " + expressionAdressNumber);

​

        string expressionAdresses2Number = Program.PathString(() => customer.Adresses[2].Number);

        Console.WriteLine("Wrong - Expected: Adresses[2].Number, Actual: " + expressionAdresses2Number);

    }

    // https://stackoverflow.com/a/22135756/2290538

    public static IReadOnlyList<MemberInfo> Get(LambdaExpression expression)

    {

        var visitor = new PropertyVisitor();

        visitor.Visit(expression.Body);

        visitor.Path.Reverse();

        return visitor.Path;

    }

​

    public static string PathString(Expression<Func<object>> expression)

    {

        return string.Join(".", Get(expression).Select(x => x.Name));

    }

}

public class PropertyVisitor : ExpressionVisitor

{

    internal readonly List<MemberInfo> Path = new List<MemberInfo>();

​

    protected override Expression VisitMember(MemberExpression node)

    {

        if ((node.Member is PropertyInfo))

        {

            this.Path.Add(node.Member);

        }

        return base.VisitMember(node);

    }

}

​

public class Customer

{

    public int Id { get; set; }

    public Adress Adress { get; set; }

    public IList<Adress> Adresses { get; set; }

}

​

public class Adress

{

    public int Id { get; set; }

    public int Number { get; set; }

}