使用Microsoft.Graph发邮件触发ODataErrors.ODataError错误求助

我在使用Microsoft.Graph发送邮件时，遇到了ODataErrors.ODataError错误。我推测可能是Azure AD配置存在遗漏，但已检查租户ID、API权限等关键项。

以下是我的代码：

public async Task<string> SendEmail()
{
    string tenantId = "0XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX3";
    string clientId = "cXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXb";
    string objectId = "4XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXa";

    string clientSecret = "tXXXX~XXXX~XXXXXXXXXXXXXXXXXXXXXXXXXXXXR";

    var options = new TokenCredentialOptions
    {
        AuthorityHost = AzureAuthorityHosts.AzurePublicCloud
    };
    var creds = new ClientSecretCredential(tenantId, clientId, clientSecret, options);

    string[] scopes = new[] { "https://graph.microsoft.com/.default" };
    var graphClient = new GraphServiceClient(creds, scopes );

    var message = new Message()
    {
        Subject = "My subject",
        Body = new ItemBody
        {
            ContentType = BodyType.Html,
            Content = "My content"
        },
        ToRecipients = new List<Recipient>()
        {
            new Recipient
            {
                EmailAddress = new EmailAddress
                {
                    Address = "My@Email.com"
                }
            }
        }
    };

    var body = new SendMailPostRequestBody();
    body.Message = message;
    body.SaveToSentItems = false;
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
    try
    {
        await graphClient.Users[objectId].SendMail.PostAsync(body);
    }
    catch (Exception ex)
    {
        return ex.ToString();
    }
    return null;
}

在Panagiotis的帮助下，我修复了一些低级错误，但仍卡在此问题上。

• 更新：我移除了解决方案中所有引用和NuGet包，再逐一重新添加，耗时数小时后问题依旧。未指定TLS1.2时会出现426错误；指定TLS1.2后则触发ODataErrors.ODataError错误。开发环境为Visual Studio 2019，所有项目基于.NET Framework 4.7.2。
• 更新2：我在Visual Studio 2022中创建了一个目标框架为.NET 7.0的空白项目，无需显式指定TLS版本，但仍出现如下错误：

Microsoft.Graph.Models.ODataErrors.ODataError: Exception of type 'Microsoft.Graph.Models.ODataErrors.ODataError' was thrown.
at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter.ThrowIfFailedResponse(HttpResponseMessage response, Dictionary2 errorMapping, Activity activityForAttributes) at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter.SendNoContentAsync(RequestInformation requestInfo, Dictionary2 errorMapping, CancellationToken cancellationToken)
at Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter.SendNoContentAsync(RequestInformation requestInfo, Dictionary2 errorMapping, CancellationToken cancellationToken) at Microsoft.Graph.Users.Item.SendMail.SendMailRequestBuilder.PostAsync(SendMailPostRequestBody body, Action1 requestConfiguration, CancellationToken cancellationToken)
at ConsoleApp.GraphHelper.SendEmail() in C:\ConsoleApp\ConsoleApp\GraphHelper.cs:line 53

希望能得到排查此问题的技术帮助。

内容的提问来源于stack exchange，提问作者Luke Wage