在我们的应用程序中，有一些非常可怕的ViewModel和Fragments，现在我们需要重构。它们是巨大的，当然应该被分解。但是我并不清楚分解的正确方式（类和数据加载的顺序会导致绑定困难
p.s.约束框架是法律和习惯（

• 之前：巨大而杂乱的类 *

public class HugeLegacyViewModel : ViewModelBase
{
    public TextViewModel FooText {get; set;}
    public ListViewModel FooList {get; set;} = new ListViewModel();

    public TextViewModel BarText {get; set;}
    public ListViewModel BarList {get; set;} = new ListViewModel();

    public HugeLegacyViewModel(IDependancy1 dependancy1)
    {
        ...
    }

    public void LoadData() // is called after object creation
    {
        var data = ...
        FooText = data.Foo.TextDto;
        FooList = data.Foo.ListDto.ToListViewModel();
        BarText = data.Bar.TextDto;
        BarList = data.Bar.ListDto.ToListViewModel();
    }
}

public class HugeLegacyFragment : FragmentBase<HugeLegacyViewModel>
{
    public void OnViewCreate(View view)
    {
        var fooText = view.FindLayoutById(Resources.Layout.fooTextLayout);
        var barText = view.FindLayoutById(Resources.Layout.barTextLayout);
        var fooList = view.FindLayoutById(Resources.Layout.fooListLayout);
        var barList = view.FindLayoutById(Resources.Layout.barListLayout);

        ShittyLegacyBinder.CreateBindings(
            () => fooText.Text == ViewModel.FooText.Text,
            () => fooText.Font == ViewModel.FooText.Font,
            () => barText.Text == ViewModel.BarText.Text,
            () => barText.Font == ViewModel.BarText.Font,

            () => fooList.List == ViewModel.FooList.List,
            () => fooList.Title == ViewModel.FooList.Title,
            () => barList.List == ViewModel.BarList.List,
            () => barList.Title == ViewModel.BarList.Title
        );
    }
}

• AFTER：一组小类 *

public class FooViewModel : ViewModelBase
{
    public string Text {get;}
    public ReadOnlyCollection List {get;}
    ...
}

public class CoolNewViewModel : ViewModelBase
{
    public FooViewModel FooVm {get; private set;} = new FooViewModel();
    public BarViewModel BarVm {get; private set;} = new BarViewModel();

    public CoolNewViewModel(IDependancy1 dependancy1)
    {
        ...
    }

    public void LoadData()
    {
        var data = ...
        FooVm = data.Foo.ToVm();
        BarVm = data.Bar.ToVm();
    }
    ...
}

public class FooView : View
{
    private FooViewModel _vm;
    private TextView _textVew;
    private ListView _listView;

    public FooView(FooViewModel vm, TextView textView, ListView listView)
    {
        ...
        ShittyLegacyBinder.CreateBindings(
            () => _textVew == _vm.Text,
            () => _listView == _vm.List
        );
    }
}

public class CoolNewFragment : FragmentBase<HugeLegacyViewModel>
{
    private FooView? _foo;
    private BarView? _bar;

    public void OnViewCreate(View view) 
    // issue is here: OnViewCreate() is called eralier than LoadData() in vm,
    // so Views are now binded to instances that will be replaced in LoadData()
    //
    // bindings lead to stub empty classes
    {
        _foo = new FooView(
            vm: ViewModel.FooVm,
            textView: view.FindLayoutById(Resources.Layout.fooTextLayout),
            listView: view.FindLayoutById(Resources.Layout.fooListLayout)
        );
        _bar = new BarView(
            vm: ViewModel.BarVm,
            textView: view.FindLayoutById(Resources.Layout.barTextLayout),
            listView: view.FindLayoutById(Resources.Layout.barListLayout)
        );
    }
    ...
}

我想为新类的属性和字段实现不变性，但这相当具有挑战性
问题描述见上述评论：虽然属性应该是不可变的，但实际上在虚拟机中它们不能。数据在创建示例后加载，因此FooVm和BarVm将被覆盖。由于Fragment的代码在vm之前执行，因此覆盖后绑定将丢失（
下面提供了一些不那么好的解决方案：

• 解决方案1：忘记不变性 *

public class FooViewModel1 : ViewModelBase
{
    public MutableString Text {get;}
    public Collection List {get;}

    public void ReplaceData(Foo data)
    {
        Text.String = data.Text;
        List.ReplaceAllWith(data.List);
    }
}

public class MediocreNewViewModel1 : ViewModelBase
{
    public FooViewModel FooVm {get; private set;} = new FooViewModel();
    public BarViewModel BarVm {get; private set;} = new BarViewModel();

    public MediocreNewViewModel1(IDependancy1 dependancy1)
    {
        ...
    }

    public void LoadData()
    {
        var data = ...
        FooVm.ReplaceData(data.Foo);
        BarVm.ReplaceData(data.Bar);
    }
    ...
}

• 解决方案2：主虚拟机中的别名 *

public class FooViewModel2 : ViewModelBase
{
    public string Text {get;}
    public ReadOnlyCollection List {get;}
    ...
}

public class MediocreNewViewModel2 : ViewModelBase
{
    private FooViewModel _fooVm = new FooViewModel();
    private BarViewModel _barVm = new BarViewModel();

    public string FooText => _fooVm.Text;
    public string FooList => _fooVm.List;
    public string BarText => _barVm.Text;
    public string FooList => _barVm.List;

    public MediocreNewViewModel2(IDependancy1 dependancy1)
    {
        ...
    }

    public void LoadData()
    {
        var data = ...
        _fooVm = data.Foo.ToVm();
        _barVm = data.Bar.ToVm();
    }
    ...
}

public class FooView2 : View
{
    private TextView _textVew;
    private ListView _listView;

    public FooView2(string text, ReadOnlyCollection list TextView textView, ListView listView)
    {
        ...
        ShittyLegacyBinder.CreateBindings(
            () => _textVew == text,
            () => _listView == list
        );
    }
}

public class MediocreNewFragment2 : FragmentBase<HugeLegacyViewModel>
{
    private FooView2? _foo;
    private BarView2? _bar;

    public void OnViewCreate(View view) 
    {
        _foo = new FooView2(
            text: ViewModel.FooText,
            list: ViewModel.FooList,
            textView: view.FindLayoutById(Resources.Layout.fooTextLayout),
            listView: view.FindLayoutById(Resources.Layout.fooListLayout)
        );
        _bar = new BarView2(
            text: ViewModel.BarText,
            list: ViewModel.BarList,
            textView: view.FindLayoutById(Resources.Layout.barTextLayout),
            listView: view.FindLayoutById(Resources.Layout.barListLayout)
        );
    }
    ...
}

• 解决方案3：将视图Map到实际Vm* 的 Package 器类

public class FooViewModel3 : ViewModelBase
{
    public string Text {get;}
    public ReadOnlyCollection List {get;}
    ...
}

public class FooViewModelWrapper
{
    private FooViewModel3 _vm;

    public string Text => _vm.Text;
    public ReadOnlyCollection List => _vm.List;

    public FooViewModelWrapper(FooViewModel3 vm)
    {
        ...
    }
}

public class MediocreNewViewModel3 : ViewModelBase
{
    private FooViewModel _fooVm = new FooViewModel();
    private BarViewModel _barVm = new BarViewModel();

    public FooViewModelWrapper FooVm {get; private set;} = new FooViewModelWrapper(_fooVm);
    public BarViewModelWrapper BarVm {get; private set;} = new BarViewModelWrapper(_barVm);

    public CoolNewViewModel(IDependancy1 dependancy1)
    {
        ...
    }

    public void LoadData()
    {
        var data = ...
        _fooVm = data.Foo.ToVm();
        _barVm = data.Bar.ToVm();
    }
    ...
}

public class FooView3 : View
{
    private FooViewModelWrapper _vm;
    private TextView _textVew;
    private ListView _listView;

    public FooView3(FooViewModelWrapper vm, TextView textView, ListView listView)
    {
        ...
        ShittyLegacyBinder.CreateBindings(
            () => _textVew == _vm.Text,
            () => _listView == _vm.List
        );
    }
}

public class MediocreNewFragment3 : FragmentBase<HugeLegacyViewModel>
{
    private FooView3? _foo;
    private BarView3? _bar;

    public void OnViewCreate(View view)
    {
        _foo = new FooView3(
            vm: ViewModel.FooVm,
            textView: view.FindLayoutById(Resources.Layout.fooTextLayout),
            listView: view.FindLayoutById(Resources.Layout.fooListLayout)
        );
        _bar = new BarView3(
            vm: ViewModel.BarVm,
            textView: view.FindLayoutById(Resources.Layout.barTextLayout),
            listView: view.FindLayoutById(Resources.Layout.barListLayout)
        );
    }
    ...
}

所以，问题：

有没有可能在没有妥协和样板代码的情况下重构它？