问如何检查ComputerName是否为INT

EN

    public class DeviceIDService
{
    public static DeviceIDService Instance = new DeviceIDService();

    private DeviceIDService()
    {
        foreach (HostName DisplayName in NetworkInformation.GetHostNames())
        {
            if (DisplayName != null)
            {
                var hostNames = NetworkInformation.GetHostNames();
                var hostName = hostNames.FirstOrDefault(name => name.Type == HostNameType.DomainName)?.DisplayName ?? "???";

                LocalName = hostName;

                break;
            }
        }
        public string LocalName { get; set; }
    }
}

public class DevicePageViewModel : ViewModelBase
{
    private string _Hostname = DeviceIDService.Instance.LocalName;
    public string hostName { get; set; }

    public override async OnNavigatedToAsync ()
    {
       int HostName;
        bool isNumeric = int.TryParse(_Hostname, out HostName);
        if (isNumeric == true)
        {
            HostName = 101070701;
        }
        else
        {
            string hostName = HostName.ToString();
        }

        var uriD = new Uri("http://localhost:2463/api/Devices/" + HostName);
        HttpClient client = new HttpClient();
        try
        {
            var JsonResponseD = await client.GetStringAsync(uriD);
            var devicesResult = JsonConvert.DeserializeObject<List<Device>>(JsonResponseD);
            Devices = devicesResult;