如何检查Uri指向的资源是否可用？

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("[Uri地址]");
request.Timeout = 10000; // 设置超时时间为10秒
try
{
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    if (response.StatusCode == HttpStatusCode.OK)
    {
        Console.WriteLine("Uri指向的资源可用");
    }
    else
    {
        Console.WriteLine("Uri指向的资源不可用");
    }
}
catch (WebException ex)
{
    Console.WriteLine("Uri指向的资源不可用");
}

$uri = "[Uri地址]"
$request = [System.Net.WebRequest]::Create($uri)
$request.Timeout = 10000 # 设置超时时间为10秒
try
{
    $response = $request.GetResponse()
    if ($response.StatusCode -eq "OK")
    {
        Write-Host "Uri指向的资源可用"
    }
    else
    {
        Write-Host "Uri指向的资源不可用"
    }
}
catch
{
    Write-Host "Uri指向的资源不可用"
}