PluginLoadContext.cs

using System.Runtime.Loader;

public class PluginLoadContext : AssemblyLoadContext
{
    public PluginLoadContext() : base(isCollectible: true) { }

    protected override Assembly? Load(AssemblyName assemblyName)
    {
        // Avoid loading dependencies into this context (prevents conflicts)
        return null;
    }
}

public class PluginReloader
{
    private readonly Dictionary<string, (PluginLoadContext Context, Assembly Assembly)> _loadedPlugins = new();

    public void LoadPlugin(string pluginPath)
    {
        var context = new PluginLoadContext();
        var assembly = context.LoadFromAssemblyPath(pluginPath);
        _loadedPlugins[pluginPath] = (context, assembly);
    }

    public void UnloadPlugin(string pluginPath)
    {
        if (_loadedPlugins.TryGetValue(pluginPath, out var plugin))
        {
            plugin.Context.Unload();
            _loadedPlugins.Remove(pluginPath);
        }
    }
}