• • 错误：**

处理请求时发生未处理的异常。InvalidOperationException：尝试激活"TestApp_03_RazorPage_Identity.Areas.Identity.Pages.Account.RegisterModel"时，无法解析类型"Microsoft. AspNetCore. Identity.用户管理器" 1 [Microsoft. AspNetCore. Identity.标识用户]"的服务。Microsoft.扩展.依赖注入.激活器实用程序. GetService（IServiceProvider sp，类型类型，所需类型，bool是默认参数必需的）

• • 详细信息**：我正在按照微软的例子，当我试图设置一个ApplicationUser类时，它仍然不起作用。我看到类似的帖子，没有什么对我起作用
• • 程序. cs**

var builder = WebApplication.CreateBuilder(args);
var connectionString = 
builder.Configuration.GetConnectionString("MyConnection");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
        options.UseSqlServer(connectionString));

builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddIdentity<ApplicationUser, IdentityRole>()
        .AddEntityFrameworkStores<ApplicationDbContext>();

builder.Services.AddRazorPages();

• • 应用程序用户. cs**

public class ApplicationUser : IdentityUser
{
    public string FullName { get; set; }
}

• • 应用程序数据库上下文. cs**

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
 {
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

• _部分登录. cshtml*

@using Microsoft.AspNetCore.Identity
@inject SignInManager<ApplicationUser> SignInManager
@inject UserManager<ApplicationUser> UserManager

• • 寄存器型号**

public class RegisterModel : PageModel
{
    private readonly SignInManager<ApplicationUser> _signInManager;
    private readonly UserManager<ApplicationUser> _userManager;
    private readonly IUserStore<IdentityUser> _userStore;
    private readonly IUserEmailStore<IdentityUser> _emailStore;
    private readonly ILogger<RegisterModel> _logger;
    private readonly IEmailSender _emailSender;