public void Unload()
{
IPluginEngine pluginEngine = container.Resolve <IPluginEngine>();
// unload plugins that are installed
foreach (Plugin plugin in container.Resolve <IPluginService>().GetPlugins())
{
PluginContainer pluginContainer = pluginEngine.GetPlugin(plugin);
if (pluginContainer != null)
{
pluginContainer.Unload();
}
}
container.RegisterInstance(pluginEngine);
}