要给出Blazor Fluxor状态的预设种子，首先需要安装Fluxor NuGet包。可以通过在Visual Studio的NuGet包管理器控制台中运行以下命令来安装Fluxor：

Install-Package Fluxor

安装完成后，可以创建一个名为Store的文件夹，并在其中创建一个名为AppState.cs的文件，这将是我们的应用程序状态模型。在AppState.cs文件中，可以定义应用程序的初始状态：

public class AppState
{
    public bool IsLoading { get; set; }
    public List Items { get; set; }

    public AppState()
    {
        IsLoading = false;
        Items = new List();
    }

    public AppState(bool isLoading, List items)
    {
        IsLoading = isLoading;
        Items = items;
    }
}

接下来，在Store文件夹中创建一个名为AppFeature的文件夹，用于存放与应用程序功能相关的文件。在AppFeature文件夹中，创建一个名为FetchData的文件夹，并在其中创建以下文件：

1. Actions.cs - 定义应用程序中可能发生的操作
2. Effects.cs - 处理操作并触发状态更改
3. Reducers.cs - 更新应用程序状态
4. Feature.cs - 注册应用程序功能

以下是这些文件的代码示例：

Actions.cs：

public class FetchDataAction
{
    public int Count { get; set; }

    public FetchDataAction(int count)
    {
        Count = count;
    }
}

public class FetchDataSuccessAction
{
    public List Items { get; set; }

    public FetchDataSuccessAction(List items)
    {
        Items = items;
    }
}

public class FetchDataFailureAction
{
    public string ErrorMessage { get; set; }

    public FetchDataFailureAction(string errorMessage)
    {
        ErrorMessage = errorMessage;
    }
}

Effects.cs：

public class FetchDataEffect : Effect
{
    private readonly HttpClient httpClient;

    public FetchDataEffect(HttpClient httpClient)
    {
        this.httpClient = httpClient;
    }

    protected override async Task HandleAsync(FetchDataAction action, IDispatcher dispatcher)
    {
        try
        {
            // 模拟异步数据获取
            await Task.Delay(2000);

            // 发起HTTP请求获取数据
            var response = await httpClient.GetAsync($"https://api.example.com/data?count={action.Count}");
            response.EnsureSuccessStatusCode();

            var data = await response.Content.ReadFromBody>();

            // 触发成功操作并传递数据
            dispatcher.Dispatch(new FetchDataSuccessAction(data));
        }
        catch (Exception ex)
        {
            // 触发失败操作并传递错误消息
            dispatcher.Dispatch(new FetchDataFailureAction(ex.Message));
        }
    }
}

Reducers.cs：

public class FetchDataReducer : Reducer,
    Reducer
{
    public override AppState Reduce(AppState state, FetchDataSuccessAction action)
    {
        return new AppState(false, action.Items);
    }

    public override AppState Reduce(AppState state, FetchDataFailureAction action)
    {
        // 处理错误，可以将错误消息存储在状态中以供显示
        return state;
    }
}

Feature.cs：

public class FetchDataFeature : Feature
{
    public override string GetName() => "FetchData";

    protected override AppState GetInitialState() => new AppState();

    protected override void RegisterReducers(ReducerRegistry registry)
    {
        registry.Register();
        registry.Register();
    }

    protected override void RegisterEffects(EffectMiddlewareBuilder builder)
    {
        builder.UseEffect();
    }
}

最后，在Store文件夹中创建一个名为Store.cs的文件，用于创建和配置Fluxor存储：

public static class Store
{
    public static IStore Initialize()
    {
        var store = new StoreFactory()
            .Create()
            .AddMiddleware()
            .AddMiddleware()
            .Build();

        store.AddFeature();