Call private methods on implementation of the abstract class. This could be handy for the abstract Aggregate class which can get the event stream and populate the aggregate.

Program.cs

using System;
using System.Linq;
using System.Reflection;

namespace abstract_impl_reflect
{
    public class Foo : FooBase
    {
        public Foo() : base()
        {
            Console.WriteLine("Foo ctor...");
            Console.WriteLine(this.GetType().FullName);
        }

        private void CallMe() 
        {
            Console.WriteLine("Boom!");
        }
    }

    public abstract class FooBase 
    {
        public FooBase()
        {
            Console.WriteLine("FooBase ctor...");
            Console.WriteLine(this.GetType().FullName);
            var method = this.GetType().GetMethod("CallMe", BindingFlags.NonPublic | BindingFlags.Instance);
            Console.WriteLine(method.Name);
            method.Invoke(this, null);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var foo = new Foo();
        }
    }
}

Output:

➜  abstract-impl-reflect dotnet run
FooBase ctor...
abstract_impl_reflect.Foo
CallMe
Boom!
Foo ctor...
abstract_impl_reflect.Foo