c# - 只需使用带有证书的.Net System.Net.WebSockets 通过 WSS 客户端检查 WSS 服务器是否打开/关闭？

Question

为什么总是出错找不到请求的对象？请参阅我的评论代码中的跟踪详细信息。

我需要实现 WSS 客户端并使用证书检查 WSS 服务器的可用性。

但是当尝试创建 的对象时X509Certificate2，出现错误：

找不到请求的对象

bool IsWssConnAlive(string WssUrl)
{
    bool flg = false;
    try
    {
        //string _certificateKeyStorePath = @"E:\bk\WSS\gateway\test\keystoreserver.der";
        string _certificateKeyStorePath = @"E:\bk\WSS\gateway\test\keystoreserver.p12";
        X509Certificate2 x509_1 = new X509Certificate2(_certificateKeyStorePath, "test@123");

        /*
         * Above X509Certificate2 statement aways giving error : "Cannot find the requested object.\r\n"}
         * I tried .der, p21, .jks getting same error
         * stack trace details :->
         
         *    at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
              at System.Security.Cryptography.X509Certificates.X509Utils._QueryCertFileType(String fileName)
              at System.Security.Cryptography.X509Certificates.X509Certificate.LoadCertificateFromFile(String fileName, Object password, X509KeyStorageFlags keyStorageFlags)
              at System.Security.Cryptography.X509Certificates.X509Certificate2..ctor(String fileName, String password)
              at Test_WssConnectivity.Program.IsWssConnAlive(String WssUrl, Int32 CheckTimeInSec) in E:\Development\SolutionForTestProject\Test_WssConnectivity\Program.cs:line 142

         */

        ClientWebSocket websocket = new ClientWebSocket();
        websocket.Options.ClientCertificates.Add(x509_1);


        X509CertificateCollection xcol = new X509CertificateCollection();
        xcol.Add(x509_1);

        websocket.Options.ClientCertificates = xcol;

        //connect to URL
        websocket.ConnectAsync(new Uri(WssUrl), CancellationToken.None);

        //Now checking actaul status
        if (websocket.State == WebSocketState.Open)
        {
            flg = true;
        }
        else if (websocket.State == WebSocketState.Closed)
        {
            flg = false;
        }
    }
    catch (Exception ex)
    {
        flg = false;
    }

    return flg;
}