encryption - C# Rijndael IV size doesn't match block size, while it should -

i have following code:

private void encryptfile(string inputfile, string outputfile, string pass)     {         try         {             string password = @pass;             unicodeencoding ue = new unicodeencoding();             byte[] key = ue.getbytes(password);             byte[] iv = new byte[128];             for(int =0; < iv.length; i++)             {                 iv[i] = convert.tobyte(true);             }             string cryptfile = outputfile;             filestream fscrypt = new filestream(cryptfile, filemode.create);              rijndaelmanaged rmcrypto = new rijndaelmanaged();             messagebox.show(rmcrypto.blocksize + "\n" + iv.length);             cryptostream cs = new cryptostream(fscrypt,                 rmcrypto.createencryptor(key, iv),                 cryptostreammode.write);              filestream fsin = new filestream(inputfile, filemode.open);              int data;             while ((data = fsin.readbyte()) != -1)                 cs.writebyte((byte)data);               fsin.close();             cs.close();             fscrypt.close();         }         catch(exception ex)         {             //messagebox.show("encryption failed!", "error");             messagebox.show(ex.message);         }     } 

but have problem iv size. using simple message box found (probably) block size 128. so, set iv 128 bytes array full of "1" values test. first message box confirms blocksize , iv array length both 128. however, exception saying specified initialization vector (iv) not match block size algorithm.

why , how fix issue?

aes block size 128 bits. not bytes. bits.

the winner of aes contest, rijndael, supports block , key sizes of 128, 192, , 256 bits, in aes block size 128 bits. block sizes not adopted aes standard