Self Contained Assembly

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows.Forms;
using AssemblyLoader;
using PanelFactory;

namespace DemoClientApp
{
    public partial class MainForm : Form
    {
        AbstractPanelFactory factory = null;
        Panel panel;

        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            var binDebug = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);

            var panelFactoryPluginFile = SearchPanelFactoryPlugin(binDebug);

            if (panelFactoryPluginFile == string.Empty)
            {
                MessageBox.Show("No Plugin Found.");
            }

            Loader.ResolveAssembly = true;

            var pluginAssembly = Loader.LoadAssembly(panelFactoryPluginFile);

            foreach (var type in pluginAssembly.GetTypes())
            {
                if (type.IsAbstract == false)
                {
                    if (type.IsClass)
                    {
                        if (type.BaseType == typeof(AbstractPanelFactory))
                        {
                            factory = pluginAssembly.CreateInstance(type.FullName) as AbstractPanelFactory;
                        }
                    }
                }
            }
        }

        private string SearchPanelFactoryPlugin(string pluginFolder)
        {
            pluginFolder = pluginFolder + "\\PlugIns";
            var dllFiles = Directory.GetFiles(pluginFolder, "*.dll");

            foreach (var dll in dllFiles)
            {
                if (Path.GetFileName(dll) != "AbstractPanelFactory.dll")
                    if (dll.EndsWith("PanelFactory.dll"))
                    {
                        return dll;
                    }
            }

            return string.Empty;
        }

        private void btnGetPanel_Click(object sender, EventArgs e)
        {
            if (factory == null)
            {
                MessageBox.Show(" Unable to find plugin.");
            }

            if (colorDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                Color selectedColor = colorDialog1.Color;
                this.Controls.Remove(panel);
                panel = factory.GetPanel(selectedColor);

                panel.Dock = DockStyle.Fill;
                this.Controls.Add(panel);
            }
        }
    }
}