C#数组是引用类型, 引用类型一定要实例化

// lengths = new long[1]; 如果没有使用List转换为array, 那么要用这行代码来实例化数组 lengths.

       public static bool GetArrayChunk(double[] data, long[] startLocations, long locationOffset, double lowLimit, 
            int numberOfConsecutivePoints, int minimumSize, out double[] chunks, out long[] lengths)
        {

           // lengths = new long[1]; 如果没有使用List转换为array, 那么要用这行代码来实例化数组 lengths.

            List<long> lengthsList = new List<long>();
            List<double> chunksList = new List<double>();
            
            for (ulong i = 0; i < (ulong)startLocations.Length; i++ )
            {
               //GetStartLocationOfLowerData(startLocation[i] + locationOffset, lowLimit,)
                long start =(long)(startLocations[i] + locationOffset);
                long end = 0;
                long k = 0;
                //ulong endOfIteration;
                //endOfIteration = 
                for(long j = start; j < (long)data.Length; j++)
                {
 
                        if (data[j] > lowLimit)
                        {
                            chunksList.Add(data[j]);
                            //i++;
                        }
                        else
                        {
                            //mr:: 如果找到了连续5个点低于lowlimit,说明找到了一个lowerLocation
                            if (IsLowerlocation(data, j, lowLimit, numberOfConsecutivePoints))
                                break;
                            else
                            {
                                chunksList.Add(data[j]);
                            }

                        }

                        end = j;

                }

                //mr:: 在一个chunk出来过程中,如果出现lowerlocation之前累积保存的点数量不到minimumSize, 则剔除这些数据.
                if ((end - start) < minimumSize)
                {
                    //mr?? 数据范围与数据类型的限制
                    chunksList.RemoveRange((int)start, (int)(end - start));
                }
                else
                {
                    //mr:: 记录下一个合格chunk的长度
                    k++;
                   // lengths[k] = end - start;

                    lengthsList.Add(end - start);
                }
            }

            //if (chunksList.)
            chunks = chunksList.ToArray();
            lengths = lengthsList.ToArray();

            if (chunks.Length > 0) 
                return true;
            else 
                return false;
        }