CASCExplorer.BackgroundWorkerEx.ReportProgress C# (CSharp) Method

        public new void ReportProgress(int percentProgress)
        {
            if (CancellationPending)
                throw new OperationCanceledException();

            if (IsBusy && percentProgress > lastProgressPercentage)
                base.ReportProgress(percentProgress);

            lastProgressPercentage = percentProgress;
        }

        public OwRootHandler(BinaryReader stream, BackgroundWorkerEx worker, CASCHandler casc)
        {
            worker?.ReportProgress(0, "Loading \"root\"...");

            string str = Encoding.ASCII.GetString(stream.ReadBytes((int)stream.BaseStream.Length));

            string[] array = str.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);

            List <string> APMNames = new List <string>();

            for (int i = 1; i < array.Length; i++)
            {
                string[] filedata = array[i].Split('|');

                string name = filedata[4];

                if (Path.GetExtension(name) == ".apm" && name.Contains("RDEV"))
                {
                    APMNames.Add(Path.GetFileNameWithoutExtension(name));
                    if (!name.Contains("L" + LanguageScan))
                    {
                        continue;
                    }
                    // add apm file for dev purposes
                    ulong   apmNameHash = Hasher.ComputeHash(name);
                    MD5Hash apmMD5      = filedata[0].ToByteArray().ToMD5();
                    _rootData[apmNameHash] = new OWRootEntry()
                    {
                        baseEntry = new RootEntry()
                        {
                            MD5 = apmMD5, LocaleFlags = LocaleFlags.All, ContentFlags = ContentFlags.None
                        }
                    };

                    CASCFile.FileNames[apmNameHash] = name;

                    EncodingEntry apmEnc;

                    if (!casc.Encoding.GetEntry(apmMD5, out apmEnc))
                    {
                        continue;
                    }

                    using (Stream apmStream = casc.OpenFile(apmEnc.Key))
                    {
                        apmFiles.Add(new APMFile(name, apmStream, casc));
                    }
                }

                worker?.ReportProgress((int)(i / (array.Length / 100f)));
            }
            APMList = APMNames.ToArray();
            APMNames.Clear();
        }