不知道如何转录wav文件从谷歌云存储的LongRunningRecognize转换为文本的C#？

using Google.Cloud.Speech.V1;
using Google.LongRunning;
using System;

public class Transcription
{
    public static void Main(string[] args)
    {
        // 设置谷歌云项目ID
        string projectId = "your-project-id";

        // 设置音频文件的存储桶和对象名称
        string bucketName = "your-bucket-name";
        string objectName = "your-audio-file.wav";

        // 创建SpeechClient实例
        SpeechClient speechClient = SpeechClient.Create();

        // 创建LongRunningRecognize请求
        RecognitionConfig config = new RecognitionConfig
        {
            Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
            SampleRateHertz = 16000,
            LanguageCode = "en-US"
        };
        RecognitionAudio audio = RecognitionAudio.FromStorageUri($"gs://{bucketName}/{objectName}");
        LongRunningRecognizeRequest request = new LongRunningRecognizeRequest
        {
            Config = config,
            Audio = audio
        };

        // 发送LongRunningRecognize请求
        Operation<LongRunningRecognizeResponse, LongRunningRecognizeMetadata> operation = speechClient.LongRunningRecognize(request);

        // 等待操作完成
        operation = operation.PollUntilCompleted();

        // 获取转录结果
        LongRunningRecognizeResponse response = operation.Result;
        foreach (SpeechRecognitionResult result in response.Results)
        {
            foreach (SpeechRecognitionAlternative alternative in result.Alternatives)
            {
                Console.WriteLine($"Transcript: {alternative.Transcript}");
            }
        }
    }
}

Install-Package Google.Cloud.Speech.V1
Install-Package Google.LongRunning