我需要一个简单的.NET谷歌语音应用程序接口示例

using Google.Cloud.Speech.V1;
using Grpc.Auth;
using Grpc.Core;
using System;

public class GoogleSpeechApiExample
{
    public static void Main(string[] args)
    {
        // 设置谷歌认证凭据
        var credential = GoogleCredential.FromFile("path/to/credential.json");

        // 创建语音识别客户端
        var speechClient = SpeechClient.Create(channel: new Channel(
            SpeechClient.DefaultEndpoint.Host, credential.ToChannelCredentials()));

        // 准备语音识别请求
        var recognitionConfig = new RecognitionConfig
        {
            Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
            SampleRateHertz = 16000,
            LanguageCode = "en-US",
        };
        var audio = RecognitionAudio.FromFile("path/to/audio.wav");

        // 发送语音识别请求
        var response = speechClient.Recognize(recognitionConfig, audio);

        // 处理语音识别结果
        foreach (var result in response.Results)
        {
            foreach (var alternative in result.Alternatives)
            {
                Console.WriteLine($"Transcript: {alternative.Transcript}");
            }
        }
    }
}