using System;

using System.Reflection;

using System.Reflection.Emit;

​

public abstract class Base

{

}

​

public class Program

{

    public static void Main()

    {

        var assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(Guid.NewGuid().ToString()), AssemblyBuilderAccess.Run);

        var moduleBuilder = assemblyBuilder.DefineDynamicModule(Guid.NewGuid().ToString());

        var typeName = "Child";

        var typeBuilder = moduleBuilder.DefineType(typeName, TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.AutoClass | TypeAttributes.AnsiClass | TypeAttributes.BeforeFieldInit | TypeAttributes.AutoLayout, typeof(Base));

        typeBuilder.DefineDefaultConstructor(MethodAttributes.Private | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);

        var assembly = typeBuilder.Assembly;

        try

        {

            assembly.GetTypes();

        }

        catch (ReflectionTypeLoadException exception)

        {

            Console.WriteLine(exception.Message);

        }

    }

}