Get Assembly Name from Referencing Core

i´ve got a project, which referencces to a nother project, a core. in a 3rd project, i´m resolving the assemblys. I easily can get the first project, but it gives me an error because of the core, it cant find it. do you know what to add?

         public MainWindow()
    {
        InitializeComponent();
        AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {

        var assembly = Assembly.Load(@"C:\Users\source\Project1\...\MainProgramm.exe");
        var windowType = assembly.DefinedTypes.FirstOrDefault(t => t != typeof(Window) && typeof(Window).IsAssignableFrom(t));

        var window = (Window)Activator.CreateInstance(windowType);
        window.Background = Brushes.Green;
        var tmp = window.ShowDialog();
    }


    static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
    {
        AssemblyName an = AssemblyName.GetAssemblyName(args.Name);

        using(var memoryStream = new MemoryStream())
        using(var fileStream = new FileStream(args.Name, FileMode.Open))
        {
            byte[] bytes = new byte[fileStream.Length];
            fileStream.Read(bytes, 0, (int)fileStream.Length);
            memoryStream.Write(bytes, 0, (int)fileStream.Length);
            return Assembly.Load(bytes);
        }
    }

the "CoreProject" it in the folderpath: @"C:\Users\source\Project1\Project1Core\"