在应用程序中正确设置RedirectUri，以便在OAuth2身份验证期间接收重定向。

示例代码：

// 应用程序设置
string clientId = "your_client_id";
string clientSecret = "your_client_secret";
string redirectUri = "http://your_app.com/oauth2/redirect";

// 创建认证上下文
AuthenticationContext authContext = new AuthenticationContext("https://login.microsoftonline.com/common");

// 创建代码块
CodeBlock = async () =>
{
    // 通过OAuth2进行身份验证
    string authUri = authContext.GetAuthorizationRequestUrlAsync(
        "https://graph.microsoft.com/",
        clientId,
        new Uri(redirectUri),
        UserIdentifier.AnyUser,
        null).Result;

    // 处理OAuth2回调
    HttpListener http = new HttpListener();
    http.Prefixes.Add(redirectUri + "/");
    http.Start();

    HttpListenerContext context = http.GetContext();
    HttpListenerRequest request = context.Request;
    HttpListenerResponse response = context.Response;

    string code = request.QueryString["code"];

    // 处理OAuth2回调后关闭HttpListener
    response.Headers.Add("Location", "https://myapp.com/oauth2/success");
    response.StatusCode = 302;
    response.Close();
    http.Stop();
};