代码的目的是启动3个task，通过调用C DLL中getSWMMout方法读取同一二级制文件中不同部分，写3个文件，NdeExtract和LinkExtract方法和SubExtract方法代码结构一致。
当两个checkBox都选中时，报错代码：托管调试助手 "FatalExecutionEngineError":“运行时遇到了错误。此错误的地址为 0x6cb8f121，在线程 0x3f58 上。错误代码为 0xc0000005。此错误可能是 CLR 中的 bug，或者是用户代码的不安全部分或不可验证部分中的 bug。此 bug 的常见来源包括用户对 COM-interop 或 PInvoke 的封送处理错误，这些错误可能会损坏堆栈。”。请问怎么解决呢？代码如下：

        //  Extract subcatch output values if checked
        if (chkSub.IsChecked == true)
        {
            progressBar1.Value = 0;
            //  define file path for subcatchment extraction
            string subcatchOutPath = "subcatch.txt";
            //  instaniate a task for extraction
            var subTask = SubExtract(subcatchOutPath);
        }
        //  Extract node output values if checked
        if (chkNode.IsChecked == true)
        {
           progressBar2.Value = 0;
            //  define file path for node extraction
            string nodeOutPath = "node.txt";
            //  instaniate a task for extraction
            var nodeTask = NodeExtract(nodeOutPath);
        }
        //  Extract linke output values if checked
        if (chkLink.IsChecked == true)
        {
            progressBar3.Value = 0;
            //  define file path for link extraction
            string linkOutPath = "link.txt";
            //  instaniate a task for extraction
            var linkTask = LinkExtract(linkOutPath);
        }

        async Task SubExtract(string outPathSub)
        //
        //  Purpose: extract variable outcome for subcatchment
        //
        {
            int errSubID;  
            int cntSub = 0;  
            int sumSubPrd = Nsubcatch * extNperiod;  //  total for subcatchment outcome
            float subValue = 0F;    //  outcome value for subcatchment extraction
            //  create file stream for writing file
            FileStream fsSubcatch = new FileStream(outPathSub, FileMode.Create);
            StreamWriter swSubcatch = new StreamWriter(fsSubcatch);

            await Task.Run(() =>
            {
                for (int i = 0; i < Nsubcatch; ++i)
                {
                    for (int j = 1; j <= extNperiod; ++j)
                    {
                        for (int k = 0; k < NsubcatchVar; ++k)
                        {
                            //  getSWMMout为C DLL中方法
                            errSubcatch = getSWMMresult(SUBCATCH, i, k, j, ref subValue);
                        }
                        //  update progressbar and textBlock value
                        cntSub++;
                        progressBar1.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal,
                            (Action)delegate ()
                            {
                                progressBar1.Value = cntSub * 100 / sumSubPrd;
                            });
                    }
                }
                //  empty buffer
                swSubcatch.Flush();
                //  close stream
                swSubcatch.Close();
                fsSubcatch.Close();
                GC.Collect();
            });
        }