这个是什么错误?怎么解决?

Question

“Managed”: 已加载“C:\WINDOWS\assembly\GAC_MSIL\mscorlib.resources\2.0.0.0_zh-CHS_b77a5c561934e089\mscorlib.resources.dll”，未加载符号。
在 System.IndexOutOfRangeException 中第一次偶然出现的“WindowsApplication5.EXE”类型的异常

Answer 1

try
                            {
                                tdTmp[k] = new Thread(new ThreadStart(new CreateAll(dr["url_class"].ToString() + "archive/" + SourceCodes[i], Convert.ToInt32(dr["class_ID"].ToString()), k).CreateAB));
                                tdTmp[k].Start();
                                IsThread = true;
                                k++;
                            }
                            catch (System.IO.IOException ke)
                            {                            }
                            finally { }
运行一段时间后这段出错