如何使用c#在谷歌云注册表中添加设备？

using Google.Cloud.Iot.V1;
using Google.Protobuf;
using Grpc.Core;
using System;

public class Program
{
    public static void Main(string[] args)
    {
        string projectId = "your-project-id";
        string cloudRegion = "your-cloud-region";
        string registryId = "your-registry-id";
        string deviceId = "your-device-id";
        string privateKeyFile = "path-to-private-key-file";

        // 读取设备私钥
        string privateKey = System.IO.File.ReadAllText(privateKeyFile);

        // 创建设备客户端
        DeviceServiceClient client = DeviceServiceClient.Create();

        // 构建设备名称
        DeviceName deviceName = new DeviceName(projectId, cloudRegion, registryId, deviceId);

        // 构建设备
        Device device = new Device
        {
            Id = deviceId,
            Credentials =
            {
                new DeviceCredential
                {
                    PublicKey = new PublicKeyCredential
                    {
                        Format = PublicKeyFormat.RsaX509Pem,
                        Key = ByteString.CopyFromUtf8(privateKey)
                    }
                }
            }
        };

        // 添加设备到注册表
        client.CreateDevice(deviceName.Parent, device);

        Console.WriteLine("设备添加成功！");
    }
}