Question

I have a little console application that I’m tinkering with just to learn something new.

In the code below, in Console.WirteLine(), if I test t.IsAbstract, or t.IsSealed, my output is AbstractClass true, or SealedClass true respectively. All others return false as I expect.

However, if I test t.IsPublic, everything, including both PublicClass and PublicInterface return false. Why is that?

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;

namespace ConsoleApplication1
{
    class Test
    { 
        static void Main(string[] args)
        {    
            Assembly assembly = Assembly.GetExecutingAssembly();
            Type[] assemblyTypes = assembly.GetTypes();
            foreach (Type t in assemblyTypes)
                Console.WriteLine(t.Name + " " + t.IsPublic);
            Console.ReadKey();
        }

        private class PrivateClass { }

        public class PublicClass { }

        protected class ProtectedClass { }

        sealed class SealedClass { }

        abstract class AbstractClass { }

        interface myInterface { }

        public interface PublicInterface { }
    }
}

Answer 1

Because they are nested inside of Test.

From the documentation: true if the Type is declared public and is not a nested type; otherwise, false.

As @Jeb’s answer and the docs suggest, typeof(PublicClass) should have a value of true for the IsNestedPublic property