using System;

using System.Linq;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        var o = new Bar();

        Console.WriteLine(typeof(Foo).GetFields().Length);

        foreach (var f in typeof(Foo).GetFields())

        {

            Console.WriteLine(f.Name);

            Console.WriteLine("Should be a go.");

        }

        var field = typeof(Foo).GetField("<Context>k__BackingField", BindingFlags.NonPublic | BindingFlags.Instance);

        //field?.SetValue(o, 5);

        Console.WriteLine(field != null);

        Console.WriteLine(o.Number);

    }

}

​

public abstract class Foo

{

    public int Number { get; private set; }

    public Foo() { Number = 10; }

}

​

public class Bar : Foo { }