C# -可在整个项目中访问的变量和列表

public static class GlobalVariables
{
    public static int GlobalInt = 10;
    public static List<string> GlobalList = new List<string> { "Item1", "Item2" };
}

public static class AppSettings
{
    public static string AppName = "MyApp";
    public static List<string> SupportedLanguages = new List<string> { "en", "fr", "es" };
}

public interface IMyService
{
    List<string> GetItems();
}

public class MyService : IMyService
{
    public List<string> GetItems()
    {
        return new List<string> { "ItemA", "ItemB" };
    }
}

// 在Startup.cs或Program.cs中配置依赖注入
public void ConfigureServices(IServiceCollection services)
{
    services.AddSingleton<IMyService, MyService>();
}

// 在控制器或其他类中使用
public class MyController : Controller
{
    private readonly IMyService _myService;

    public MyController(IMyService myService)
    {
        _myService = myService;
    }

    public IActionResult Index()
    {
        var items = _myService.GetItems();
        // ...
    }
}