How to merge files

• 

  Benson_968 May 08, 2021 06:44 (Edited May 10, 2021 04:01)

  Why not just use the Stream.CopyTo(Stream destination) method?

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  private static void CombineMultipleFilesIntoSingleFile(string inputDirectoryPath, string inputFileNamePattern, string outputFilePath)
  {
      string[] inputFilePaths = Directory.GetFiles(inputDirectoryPath, inputFileNamePattern);
      Console.WriteLine("Number of files: {0}.", inputFilePaths.Length);
      using (var outputStream = File.Create(outputFilePath))
      {
          foreach (var inputFilePath in inputFilePaths)
          {
              using (var inputStream = File.OpenRead(inputFilePath))
              {
                  // Buffer size can be passed as the second argument.
                  inputStream.CopyTo(outputStream);
              }
              Console.WriteLine("The file {0} has been processed.", inputFilePath);
          }
      }
  }

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