以下是一个使用Asp.Net Microsoft Identity和OAuth和OpenId的代码示例解决方案：

1. 首先安装所需的NuGet包：

Install-Package Microsoft.AspNet.Identity.Owin
Install-Package Microsoft.Owin.Security.OAuth
Install-Package Microsoft.Owin.Security.OpenIdConnect

2. 在Startup.cs文件中配置身份验证和授权：

public void Configuration(IAppBuilder app)
{
    app.UseCookieAuthentication(new CookieAuthenticationOptions
    {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
        LoginPath = new PathString("/Account/Login"),
        Provider = new CookieAuthenticationProvider
        {
            OnValidateIdentity = SecurityStampValidator.OnValidateIdentity(
                validateInterval: TimeSpan.FromMinutes(30),
                regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))
        }
    });

    app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

    app.UseOAuthBearerTokens(new OAuthAuthorizationServerOptions
    {
        TokenEndpointPath = new PathString("/Token"),
        Provider = new ApplicationOAuthProvider(),
        AccessTokenExpireTimeSpan = TimeSpan.FromDays(14),
        AllowInsecureHttp = true
    });

    app.UseOpenIdConnectAuthentication(new OpenIdConnectAuthenticationOptions
    {
        ClientId = "your-client-id",
        Authority = "https://your-identity-provider-url",
        RedirectUri = "your-redirect-uri",
        ResponseType = "code id_token",
        Scope = "openid email profile",
        SignInAsAuthenticationType = DefaultAuthenticationTypes.ExternalCookie
    });
}

3. 创建一个自定义的OAuth提供程序：

public class ApplicationOAuthProvider : OAuthAuthorizationServerProvider
{
    public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
    {
        context.Validated();
    }

    public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
    {
        // 验证用户名和密码
        var userManager = context.OwinContext.GetUserManager();
        var user = await userManager.FindAsync(context.UserName, context.Password);

        if (user == null)
        {
            context.SetError("invalid_grant", "The username or password is incorrect.");
            return;
        }

        // 验证成功后生成身份验证票据
        var identity = await user.GenerateUserIdentityAsync(userManager);
        var ticket = new AuthenticationTicket(identity, null);

        context.Validated(ticket);
    }
}

4. 在AccountController.cs文件中添加登录和注销的动作：

public class AccountController : Controller
{
    private readonly ApplicationUserManager _userManager;
    private readonly IAuthenticationManager _authenticationManager;

    public AccountController(ApplicationUserManager userManager, IAuthenticationManager authenticationManager)
    {
        _userManager = userManager;
        _authenticationManager = authenticationManager;
    }

    public async Task Login()
    {
        var authenticationProperties = new AuthenticationProperties
        {
            RedirectUri = "/Home/Index"
        };

        // 发起外部登录请求
        await HttpContext.GetOwinContext().Authentication.ChallengeAsync(OpenIdConnectAuthenticationDefaults.AuthenticationType, authenticationProperties);

        return new HttpUnauthorizedResult();
    }

    public ActionResult Logout()
    {
        _authenticationManager.SignOut(
            DefaultAuthenticationTypes.ApplicationCookie,
            OpenIdConnectAuthenticationDefaults.AuthenticationType,
            CookieAuthenticationDefaults.AuthenticationType);

        return RedirectToAction("Index", "Home");
    }
}

这是一个基本的示例，可通过配置和自定义来满足特定的需求。