相关疑难解决方法(0)

我有一个PDF文件。
当我想使用下面的代码对其进行加密时，Length of the data to encrypt is invalid.发生了错误：

  string inputFile = @"C:\sample.pdf";
  string outputFile = @"C:\sample_enc.pdf";

  try
  {    
    using (RijndaelManaged aes = new RijndaelManaged())
    {
      byte[] key = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
      byte[] iv = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };

      aes.Key = key;
      aes.IV = iv;

      aes.Mode = CipherMode.CFB;
      aes.Padding …