拔掉COM / SERIAL到USB的电源插头。内存泄漏

Question

最后解决以下所有问题的方法是在运行我的应用程序的计算机上安装DotNet v4.5，即使我的应用程序是为DotNet v4.0开发和设计的

当COM转USB转换器从计算机上拔下时，我面临内存泄漏。 内存转储告诉我，我有数百个新的System.Threading.OverlappedData对象。

Type        System.Threading.OverlappedData
New objects   246368
New bytes    16753024
Dead bytes      0
Bytes delta 16753024

Type System.IO.Ports.SerialStream+SerialStreamAsyncResult
New objects  246353
New bytes   9854120
Dead bytes  0
Bytes delta 9854120

Type    System.Threading._IOCompletionCallback
New objects  246352
New bytes   6897856
Dead bytes  0
Bytes delta 6897856

我的测试应用程序只打开端口，没有事件监听器。使用System;

using System.IO.Ports;
using System.Text;

namespace OpenSerialPortApp
{
    class Program
    {
        static void Main(string[] args)
        {
            var Sp = new SerialPort
            {
                StopBits = StopBits.One,
                BaudRate = 9600,
                DataBits = 8,
                Parity = Parity.None,
                Encoding = Encoding.UTF8,
                PortName = "COM5"
            };

            Console.WriteLine("Port Created");

            Sp.Open();

            Console.WriteLine("Port started");

            //No I just unplug my COM to USB converter. 

            Console.ReadKey();
        }
    }
}

我尝试在拔下插头时关闭并处理串口。但它没有太大的区别。它减少了内存泄漏量，但不能解决我的问题。

private void CloseAndDisposeSerialPort()
{
    var localRefToPort = DeviceSerialPort;
    DeviceSerialPort = null;
    try
    {
        if (localRefToPort == null) return;
        try
        {

            localRefToPort.Close();
        }
        catch (Exception cex)
        {
            //do logging
        }
        finally
        {
            try
            {
                localRefToPort.Dispose();
            }
            catch (Exception dex)
            {
                //do logging
            }
        }
    }
    catch (Exception ex)
    {
        //do logging
    }
}

内存堆栈无法从UnhandledExceptionHandler获取。

Exception of type 'System.OutOfMemoryException' was thrown.
   at System.IO.Ports.SerialStream.EventLoopRunner.WaitForCommEvent()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

我从港口读书时得到的下一个堆栈。 （上面的代码示例没有它）

Exception of type 'System.OutOfMemoryException' was thrown.
   at Microsoft.Win32.Win32Native.CreateEvent(SECURITY_ATTRIBUTES lpSecurityAttributes, Boolean isManualReset, Boolean initialState, String name)
   at System.Threading.EventWaitHandle..ctor(Boolean initialState, EventResetMode mode, String name)
   at System.Threading.ManualResetEvent..ctor(Boolean initialState)
   at System.IO.Ports.SerialStream.BeginReadCore(Byte[] array, Int32 offset, Int32 numBytes, AsyncCallback userCallback, Object stateObject)
   at System.IO.Ports.SerialStream.ReadByte(Int32 timeout)
   at System.IO.Ports.SerialStream.ReadByte()
   at System.IO.Ports.SerialPort.ReadByte()
   at TestClass.SerialPortDataReceived(Object sender, SerialDataReceivedEventArgs e)

我认为MSDN上有一篇关于我的问题的文章。但我不确定如何应用建议的解决方案。 我正在与这个问题作斗争将近两周。我试图尽快检测设备断开时刻并关闭/配置端口，但它没有帮助。任何建议都非常感谢。