如何防止此异常：值不在预期范围内。用WaitHandle.WaitAny方法？

Exception at QueueCompareProcessThread() Message:Value does not fall within the expected range. Trace: at System.Threading.WaitHandle.WaitMultiple(WaitHandle[] waitHandles, Int32 millisecondsTimeout, Boolean exitContext, Boolean WaitAll) at System.Threading.WaitHandle.WaitAny(WaitHandle[] waitHandles, Int32 millisecondsTimeout, Boolean exitContext) at System.Threading.WaitHandle.WaitAny(WaitHandle[] waitHandles)Exception at QueueCompareProcessThread() Me