c# plugin Collections .NET: Failed to unload assemblies

[dream-young-soul]

Godot version

4.0 beta16

System information

windows11

Issue description

c# plugin include assembly collection object throws error

`#if TOOLS
using Godot;
using System;
using System.Collections.Generic;

[Tool]
public partial class test_plugin : EditorPlugin
{
protected Control _control;
//this__object
protected Dictionary<int, object> _dic_object = new Dictionary<int, object>();

public test_plugin()
{
  

    

}
protected override void Dispose(bool disposing)
{
    
  
    _control = null;
    _dic_object.Clear();
    _dic_object = null;
}
public override void _EnterTree()
{
	// Initialization of the plugin goes here.
}

public override void _ExitTree()
{

}

public override void _EnablePlugin()
{
   
        
    _control = new Control()
    {
        CustomMinimumSize = new Vector2(100, 100)
    };

    _control.AddChild(new Label()
    {
        Text = "hello",
        CustomMinimumSize = new Vector2(100, 100)
    });
    GetEditorInterface().GetEditorMainScreen().AddChild(_control);
        
   
	_MakeVisible(false);

     object script = new Class1();
     string json_data = Newtonsoft.Json.JsonConvert.SerializeObject(script);

    _dic_object.Add(1, Newtonsoft.Json.JsonConvert.DeserializeObject(json_data, typeof(Class1))) ;
}

public override void _DisablePlugin()
{
    base._DisablePlugin();
    _dic_object.Clear();
    GD.Print("_DisablePlugin");

}

public override void _MakeVisible(bool visible)
{
    if (_control == null) return;
    if (visible)
        _control.Show();
    else _control.Hide();
}
public override bool _HasMainScreen()
{
    return true;
}

public override string _GetPluginName()
{
    return "name";
}

}
#endif`

Steps to reproduce

1.enable [test_plugin] plugin
2.disable [test_plugin] plugin
3.changed [new_script.cs] code, rebuild project.

Minimal reproduction project

test_demo.zip

[raulsntos]

Duplicate of #70026