Youtube API-如何设置游戏标题

我正在用C#编写一个项目，目的是自动化我的流媒体准备工作。

我已经成功地创建了流和广播，但在为广播分配视频游戏标题时我失败了。

我收到状态200，但它仍然不会改变。

liveBroadcast = new LiveBroadcast();
liveBroadcast.Status = new LiveBroadcastStatus();
liveBroadcast.Status.PrivacyStatus = "private";
liveBroadcast.Snippet = new LiveBroadcastSnippet();
liveBroadcast.Snippet.Title = title;
liveBroadcast.Snippet.Description = description;
liveBroadcast.Snippet.ScheduledStartTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 19, 0, 0, 0);
liveBroadcast.Snippet.ScheduledEndTime = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 21, 0, 0, 0);
liveBroadcast.TopicDetails = new LiveBroadcastTopicDetails();
liveBroadcast.TopicDetails.Topics = new List<LiveBroadcastTopic>();
var liveBroadcastTopic = new LiveBroadcastTopic();
liveBroadcastTopic.Type = "videoGame";
liveBroadcastTopic.Unmatched = false;
liveBroadcastTopic.Snippet = new LiveBroadcastTopicSnippet();
liveBroadcastTopic.Snippet.Name = "ARMA 3";
liveBroadcastTopic.Snippet.ReleaseDate = "2013";
liveBroadcast.TopicDetails.Topics.Add(liveBroadcastTopic);
liveBroadcast = await youtubeService.LiveBroadcasts.Insert(liveBroadcast, "status,snippet,topicDetails").ExecuteAsync();

有什么想法吗？