c# How to programmatically load external assemblies with the same namespace

Question

I have a "frontend" form application.

In my application the user can chooses external dll assemblies from different directoryes:

plugins_repository_directory  
|
|    first_item_directory   
|        Plugin.dll
|        ...
|
|    second_item_directory   
|        Plugin.dll
|        ...
|     
|    last_item_directory
|        Plugin.dll

All the external assemblies have the same namespace and some common features:

Every "Plugin" have a UserControl.EntryPointView class and a static PluginInfos class.

Ok

When the user choose a plugin from file-system i do the following:

public void LoadPlugin(string fileName){

    myPlugin= Assembly.LoadFile(fileName) //remember to use LoadFile instead of Load

    Type entryPointViewType= myPlugin.GetType("Plugin.EntryPointView");

    UserControl myPluginView (UserControl)Activator.CreateInstance(entryPointViewType);

    myFrontendPanel.Controls.add(myPluginView);

    ((IEntryPointView)myPluginView).initialize(Stuff somestuff);

    //and so on...
}

Now the user can work on his plugin loaded inside the front-end panel.. very good

After a while the user want to load a different plugin, so he chooses a different dll file and basically I dispose the old EntryPointView instance and I run LoadPlugin() again.

I think you are understanding what I am trying to achieve: Various plugins assemblies have the same name/namespace because I want to quick build new plugins via copy-past plugin project -> add/remove/change functionalities -> build as dll -> et voilà

Now it seems legit to me but i am not very experienced architect so I want to ask some question:

• Am I doing it right?
• Is there any better and simple way to achieve my goals?
• Is there some sneaky trap laying under my architecture?
• Is there a way to "unload" from memory old plugin assembly when the user chose another one?

thank you in advance