Private Shared Sub EncryptData(inName As String, outName As String, _
    rijnKey() As Byte, rijnIV() As Byte)

        'Create the file streams to handle the input and output files.
        Dim fin As New FileStream(inName, FileMode.Open, FileAccess.Read)
        Dim fout As New FileStream(outName, FileMode.OpenOrCreate, _
           FileAccess.Write)
        fout.SetLength(0)

        'Create variables to help with read and write.
        Dim bin(100) As Byte 'This is intermediate storage for the encryption.
        Dim rdlen As Long = 0 'This is the total number of bytes written.
        Dim totlen As Long = fin.Length 'Total length of the input file.
        Dim len As Integer 'This is the number of bytes to be written at a time.
        'Creates the default implementation, which is RijndaelManaged.
        Dim rijn As SymmetricAlgorithm = SymmetricAlgorithm.Create()
        Dim encStream As New CryptoStream(fout, _
           rijn.CreateEncryptor(rijnKey, rijnIV), CryptoStreamMode.Write)

        Console.WriteLine("Encrypting...")

        'Read from the input file, then encrypt and write to the output file.
        While rdlen < totlen
            len = fin.Read(bin, 0, 100)
            encStream.Write(bin, 0, len)
            rdlen = Convert.ToInt32(rdlen + len)
            Console.WriteLine("{0} bytes processed", rdlen)
        End While

        encStream.Close()
    fout.Close()
    fin.Close()
    End Sub

private static void EncryptData(String inName, String outName, byte[] rijnKey, byte[] rijnIV)
 {    
     //Create the file streams to handle the input and output files.
     FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
     FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
     fout.SetLength(0);

     //Create variables to help with read and write.
     byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
     long rdlen = 0;              //This is the total number of bytes written.
     long totlen = fin.Length;    //This is the total length of the input file.
     int len;                     //This is the number of bytes to be written at a time.

     SymmetricAlgorithm rijn = SymmetricAlgorithm.Create(); //Creates the default implementation, which is RijndaelManaged.         
     CryptoStream encStream = new CryptoStream(fout, rijn.CreateEncryptor(rijnKey, rijnIV), CryptoStreamMode.Write);

     Console.WriteLine("Encrypting...");

     //Read from the input file, then encrypt and write to the output file.
     while(rdlen < totlen)
     {
         len = fin.Read(bin, 0, 100);
         encStream.Write(bin, 0, len);
         rdlen = rdlen + len;
         Console.WriteLine("{0} bytes processed", rdlen);
     }

     encStream.Close();  
     fout.Close();
     fin.Close();                   
 }

void EncryptData( String^ inName, String^ outName, array<Byte>^rijnKey, array<Byte>^rijnIV )
{

   //Create the file streams to handle the input and output files.
   FileStream^ fin = gcnew FileStream( inName,FileMode::Open,FileAccess::Read );
   FileStream^ fout = gcnew FileStream( outName,FileMode::OpenOrCreate,FileAccess::Write );
   fout->SetLength( 0 );

   //Create variables to help with read and write.
   array<Byte>^bin = gcnew array<Byte>(100);
   long rdlen = 0; //This is the total number of bytes written.

   long totlen = (long)fin->Length; //This is the total length of the input file.

   int len; //This is the number of bytes to be written at a time.

   SymmetricAlgorithm^ rijn = SymmetricAlgorithm::Create(); //Creates the default implementation, which is RijndaelManaged.         

   CryptoStream^ encStream = gcnew CryptoStream( fout,rijn->CreateEncryptor( rijnKey, rijnIV ),CryptoStreamMode::Write );
   Console::WriteLine( "Encrypting..." );

   //Read from the input file, then encrypt and write to the output file.
   while ( rdlen < totlen )
   {
      len = fin->Read( bin, 0, 100 );
      encStream->Write( bin, 0, len );
      rdlen = rdlen + len;
      Console::WriteLine( "{0} bytes processed", rdlen );
   }

   encStream->Close();
   fout->Close();
   fin->Close();
}

private static void EncryptData(String inName, String outName,
    ubyte rijnKey[], ubyte rijnIV[])
{
    //Create the file streams to handle the input and output files.
    FileStream fin = new FileStream(inName, FileMode.Open,
        FileAccess.Read);
    FileStream fout = new FileStream(outName, FileMode.OpenOrCreate,
        FileAccess.Write);
    fout.SetLength(0);

    //Create variables to help with read and write.
    //Following is intermediate storage for the encryption.
    ubyte bin[] = new ubyte[100]; 
    //Following is the total number of bytes written.
    long rdlen = 0;
    //Following is the total length of the input file.
    long totlen = fin.get_Length(); 
    //Following is the number of bytes to be written at a time.
    int len; 

    //Create the default implementation, which is RijndaelManaged.         
    SymmetricAlgorithm rijn = SymmetricAlgorithm.Create(); 
    CryptoStream encStream = new CryptoStream(fout, 
        rijn.CreateEncryptor(rijnKey, rijnIV), CryptoStreamMode.Write);

    Console.WriteLine("Encrypting...");

    //Read from the input file, then encrypt and write to the output file.
    while (rdlen < totlen) {
        len = fin.Read(bin, 0, 100);
        encStream.Write(bin, 0, len);
        rdlen = rdlen + len;
        Console.WriteLine("{0} bytes processed", (System.Int64)rdlen);
    }
    encStream.Close();
    fout.Close();
    fin.Close();
} //EncryptData