using System;

public class User

{

    public string Username {get;set;}   

}

​

public class Program

{

    public static void Main()

    {

        var user = new User();

        user.Username = "Henrik";

        var nameOfFieldOnUser = nameof(user.Username);

        Console.WriteLine("Hello " + user.Username + " Property: " + nameOfFieldOnUser);

    }

}