c# – 尝试加载应用程序时发生以下错误. – OwinStartupAttribut

Idnetity Conf：

public class ApplicationRoleManager : RoleManager<IdentityRole>
{
    public ApplicationRoleManager(IRoleStore<IdentityRole,string> roleStore)
        : base(roleStore)
    {
    }

    public static ApplicationRoleManager Create(IdentityFactoryOptions<ApplicationRoleManager> options,IOwinContext context)
    {
        return new ApplicationRoleManager(new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
    }
}

.

启动：

using System;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.Google;
using Owin;
using Identity_Work.Models;

namespace Identity_Work
{
    public partial class Startup
    {
        public void ConfigureAuth(IAppBuilder app)
        {
            app.CreatePerOwinContext(ApplicationDbContext.Create);
            app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
            app.CreatePerOwinContext<ApplicationRoleManager>(ApplicationRoleManager.Create);
            app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);
            app.UseCookieAuthentication(new CookieAuthenticationOptions
            {
                AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,LoginPath = new PathString("/Account/Login"),Provider = new CookieAuthenticationProvider
                {  
                    OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager,ApplicationUser>(
                        validateInterval: TimeSpan.FromMinutes(30),regenerateIdentity: (manager,user) => user.GenerateUserIdentityAsync(manager))
                }
            });
            app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);            app.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie,TimeSpan.FromMinutes(5));    app.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie);
        }
    }
}

.
Web配置：

<appSettings>
<add key="webpages:Version" value="3.0.0.0" />
<add key="webpages:Enabled" value="false" />
<add key="ClientValidationEnabled" value="true" />
<add key="UnobtrusiveJavaScriptEnabled" value="true" />
<add key="owin:AppStartup" value="Identity_Work.IdentityConfig" />

控制器：

[AllowAnonymous]
public ActionResult Register()
{
    ViewBag.name = new SelectList(db.Roles,"RoleID","RoleName");

    return View();
}

查看：

<div class="form-group">
    <label>??? ?????</label>
    <div class="col-md-10">
        @Html.DropDownList("name","--Select Name--")
    </div>
</div>

但是当我运行项目时显示这个错误：

The following errors occurred while attempting to load the app.
– The OwinStartupAttribute.FriendlyName value ” does not match the given value ‘Identity_Work.IdentityConfig’ in Assembly ‘Identity_Work,Version=1.0.0.0,Culture=neutral,PublicKeyToken=null’.
– The given type or method ‘Identity_Work.IdentityConfig’ was not found. Try specifying the Assembly.
To disable OWIN startup discovery,add the appSetting owin:AutomaticAppStartup with a value of “false” in your web.config.
To specify the OWIN startup Assembly,Class,or Method,add the appSetting owin:AppStartup with the fully qualified startup class or configuration method name in your web.config.

.有什么问题 ？

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