using System;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(typeof(Foo).GetMethod("GetName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) is null);

        Console.WriteLine(typeof(BarBase).GetMethod("GetName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) is null);

        Console.WriteLine(typeof(Bar).GetMethod("GetName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) is null);

        Console.WriteLine(typeof(Bar2).GetMethod("GetName", BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly) is null);

    }

    interface IFoo

    {

        string GetName();

    }

    class Foo : IFoo

    {

        public string GetName() => "Foo";

    }

    class BarBase : IFoo

    {

        public virtual string GetName() => "BarBase";

    }

    class Bar : BarBase

    {

    }

    class Bar2 : BarBase

    {

        public override string GetName() => "Bar2";

    }

}