我的后台工作者报告超过100%

我正在编写一个复制文件的程序.我有正确的文件复制,进度条更新,但我收到一个错误,指出e.ProgressPercentage是101. bgWorker_ProgressChanged事件处理程序的代码是:

private void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        // We will increase the progress bar when work progress is reported.
                    pbCopyProgress.Maximum = 100;
        pbCopyProgress.Value = e.ProgressPercentage;        
    }

以下是bgWorker_DoWork事件处理程序的代码:

private void bgWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        // Gets the size of the file in bytes.
        Int64 iSize = strInputFile.Length;

        // Keeps track of the total bytes downloaded so we can update the progress bar.
        Int64 iRunningByteTotal = 0;
            // Open the input file for reading.
        using (FileStream InputFile = new FileStream(strInputFile, FileMode.Open, FileAccess.Read, FileShare.None))
        {
            // Using the FileStream object, we can write the output file.
            using (FileStream OutputFile = new FileStream(strOutputFile, FileMode.Create, FileAccess.Write, FileShare.None))
            {
                // Loop the stream and get the file into the byte buffer.
                int iByteSize = 0;
                byte[] byteBuffer = new byte[iSize];

                while ((iByteSize = InputFile.Read(byteBuffer, 0, byteBuffer.Length)) > 0)                    
                {
                    // Calculate the progress out of a base "100."
                    double dIndex;
                    double dTotal;
                    double dProgressPercentage;
                    // Write the bytes to the file system at the file path specified.                        
                    dIndex = (double)(iRunningByteTotal);
                    dTotal = (double)byteBuffer.Length;
                    dProgressPercentage = (dIndex / dTotal);
                    OutputFile.Write(byteBuffer, 0, iByteSize);
                    iRunningByteTotal += iByteSize;
                    intProgress = Convert.ToUInt16(dProgressPercentage);
                    // Update the progress bar.
                    bgWorker.ReportProgress(intProgress);

                }                    
                // Close the output file.
                OutputFile.Close();
            }
            // Close the input file.
            InputFile.Close();
        }
    }

正如我所说,进度条正在更新,但我收到错误,因为它似乎在文件达到100%后继续复制.如果我在bgWorker.ReportProgress(intProgress)行之后立即放入MessageBox.Show(Convert.ToString(intProgress)),对话框将弹出101文本.任何帮助将不胜感激.