C＃'无法访问已处置的对象。 对象名称：“ SslStream”。

Question

The exception in my questions title is being thrown on the line return allMessages; in the code below. I don't understand it because that line of code is still within the using (var sslStream...) statement, so by the time it is executed the SslStream object should not be disposed..

public static List<Message> FetchAllMessages(string hostname, int port, string username, string password, string proxyIp, int proxyPort)
{
    // The client disconnects from the server when being disposed
    using (Pop3Client client = new Pop3Client())
    {
        var proxyClient = new HttpProxyClient(proxyIp, proxyPort);
        using (var sslStream = new SslStream(proxyClient.CreateConnection(hostname, port).GetStream()))
        {
            sslStream.AuthenticateAsClient(hostname);
            client.Connect(sslStream);
            // Authenticate ourselves towards the server
            client.Authenticate(username, password);
            // Get the number of messages in the inbox
            int messageCount = client.GetMessageCount();

            // We want to download all messages
            List<Message> allMessages = new List<Message>(messageCount);

            // Messages are numbered in the interval: [1, messageCount]
            // Ergo: message numbers are 1-based.
            // Most servers give the latest message the highest number
            for (int i = messageCount; i > 0; i--)
            {
                allMessages.Add(client.GetMessage(i));
            }
                            // Now return the fetched messages
            return allMessages;
        }
    }
}

UPDATES:

Put a breakpoint on return allMessages; and hovered over the sslStream object, it is not disposed.

When I remove the using statement and just declare var sslStream it works but I don't think this would scale well without it..

Answer 1

因此，我实际上没有任何解释，但是重新启动计算机可以解决问题，这样做之后代码可以正常运行...