如何抑制来自程序集的异常

Question

我有一个使用pjsua2（SIP协议）的winforms应用程序winforms是一个带有框架4.7的64位应用程序。 pjsua2是一个x86程序集。当我销毁PJSUA2实例时，它会引发异常。奇怪的是，它没有被放置代码的try / catch捕获。我不明白为什么？

有没有办法抑制此异常？

     /// <summary>
    /// brief UserAgent::UserAgentStop
    /// </summary>
    public void UserAgentStop()
    {
        Console.Write("Stopping endpoint");
        ///this code destroys the SIP connection and clears the relevant objects
        try
        {
            ep.mediaRemove(play_med);
            ep.mediaRemove(cap_med);
            //dispose all sip objects, so they can be garbage collected

            ep.libStopWorkerThreads();
            ep.libDestroy();
            ep.Dispose();
            //// Send new state
            forwardNewRegState(-2);

            //force garbage collection of all disposed objects
            GC.Collect();
        }
        catch (Exception ex)
        {
            Logging.LogAppender.AppendToLog("Error UN-registering SIP connection: " + ex.Message);


         }
    }