的过程.在处置进程后触发ErrorDataReceived

我的代码如下，有时得到ObjectDisposedException在errorWaitHandle.Set();。

当我的流程实例被处置时，怎么会发生这种情况?

系统。ObjectDisposedException:安全句柄已关闭

public static int Execute(string filename, string arguments, out string output, out string error, int timeoutInMilliSeconds = Timeout.Infinite)
    {
        using (AutoResetEvent outputWaitHandle = new AutoResetEvent(false), errorWaitHandle = new AutoResetEvent(false))
        {
            // separate using for process to ensure this is disposed before handles above.
            using (System.Diagnostics.Process process = new System.Diagnostics.Process())
            {
                process.StartInfo.FileName = filename;
                process.StartInfo.Arguments = arguments;
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;
                StringBuilder outputSB = new StringBuilder();
                StringBuilder errorSB = new StringBuilder();
                process.OutputDataReceived += (sender, e) =>
                {
                    if (e.Data == null)
                    {
                        outputWaitHandle.Set();
                    }
                    else
                    {
                        outputSB.AppendLine(e.Data);
                    }
                };
                process.ErrorDataReceived += (sender, e) =>
                {
                    if (e.Data == null)
                    {
                        errorWaitHandle.Set();
                    }
                    else
                    {
                        errorSB.AppendLine(e.Data);
                    }
                };
                process.Start();
                // See http://stackoverflow.com/questions/139593/processstartinfo-hanging-on-waitforexit-why
                // for why we need to read output and error asynch
                process.BeginOutputReadLine();
                process.BeginErrorReadLine();
                if (!process.WaitForExit(timeoutInMilliSeconds) ||
                    !outputWaitHandle.WaitOne(timeoutInMilliSeconds) ||
                    !errorWaitHandle.WaitOne(timeoutInMilliSeconds))
                {
                    throw new TimeoutException(
                        string.Format("Executing [{0}] with argument [{1}] didn't finish within timeout {2} milliseconds", filename, arguments, timeoutInMilliSeconds));
                }
                output = outputSB.ToString();
                error = errorSB.ToString();
                return process.ExitCode;
            }
        }
    }