public class PluginLoadContext: AssemblyLoadContext
{
    private readonly AssemblyDependencyResolver _resolver;

    public PluginLoadContext(string pluginPath)
    {
        _resolver = new AssemblyDependencyResolver(pluginPath);
    }

    protected override Assembly? Load(AssemblyName assemblyName)
    {
        var assemblyPath = _resolver.ResolveAssemblyToPath(assemblyName);
        if (assemblyPath != null)
        {
            return LoadFromAssemblyPath(assemblyPath);
        }

        return null;
    }

    protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
    {
        var libraryPath = _resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
        if (libraryPath != null)
        {
            return LoadUnmanagedDllFromPath(libraryPath);
        }

        return IntPtr.Zero;
    }
}

public void LoadDll(string path)
{
    var loadContext = new PluginLoadContext(path);
    var assem = loadContext.LoadFromAssemblyName(AssemblyName.GetAssemblyName(path));
    if (assem == null)
    {
        return;
    }
    var types = assem.GetTypes();
    // TODO 获取需要的类
}