using System;

using System.Linq.Expressions;

public class Program

{

    public static class Util

    {

        public static string NameOf<T>(Expression<Func<T, object>> expression)

        {           

            var memberExpression = expression.Body as MemberExpression

                                    ?? ((UnaryExpression)expression.Body).Operand as MemberExpression;

            return memberExpression.Member.Name;

        }

    }

    public static void Main()

    {

        var name = Util.NameOf<Bar>(x => x.Baz); //Baz

        Console.WriteLine(name);

    }

    public class Bar

    {

        public int Baz { get; set; }

    }

}