在Microsoft Graph .Net SDK中重用GraphServiceClient的建议是什么？

public class GraphServiceClientSingleton
{
    private static GraphServiceClient _instance;
    private static readonly object _lock = new object();

    public static GraphServiceClient Instance
    {
        get
        {
            if (_instance == null)
            {
                lock (_lock)
                {
                    if (_instance == null)
                    {
                        _instance = CreateGraphServiceClient();
                    }
                }
            }
            return _instance;
        }
    }

    private static GraphServiceClient CreateGraphServiceClient()
    {
        // 在此处进行认证和初始化GraphServiceClient实例
        // 可以使用适当的身份验证凭据和权限范围
        // 例如，使用应用程序凭据进行身份验证
        IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
            .Create("YourAppClientId")
            .WithClientSecret("YourAppClientSecret")
            .WithAuthority("https://login.microsoftonline.com/YourTenantId")
            .Build();

        ClientCredentialProvider authProvider = new ClientCredentialProvider(confidentialClientApplication);

        // 创建GraphServiceClient实例
        GraphServiceClient graphClient = new GraphServiceClient(authProvider);

        return graphClient;
    }
}