which hide text and audio
please help me
code :
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public void Hide(Stream messageStream, Stream keyStream){

byte[] waveBuffer = new byte;
byte message, bit, waveByte;
int messageBuffer; //receives the next byte of the message or -1
int keyByte; //distance of the next carrier sample

//loop over the message, hide each byte
while( (messageBuffer=messageStream.ReadByte()) >= 0 ){
//read one byte of the message stream
message = (byte)messageBuffer;

//for each bit in [message]
for(int bitIndex=0; bitIndex<8; bitIndex++){

//read a byte from the key
keyByte = GetKeyValue(keyStream);

//skip a couple of samples
for(int n=0; n<keyByte-1; n++){
//copy one sample from the clean stream to the carrier stream
sourceStream.Copy(
waveBuffer, 0,
waveBuffer.Length, destinationStream);
}

//read one sample from the wave stream
sourceStream.Read(waveBuffer, 0, waveBuffer.Length);
waveByte = waveBuffer;

//get the next bit from the current message byte...
bit = (byte)(((message & (byte)(1 << bitIndex)) > 0) ? 1 : 0);

//...place it in the last bit of the sample
if((bit == 1) && ((waveByte % 2) == 0)){
waveByte += 1;
}else if((bit == 0) && ((waveByte % 2) == 1)){
waveByte -= 1;
}

waveBuffer = waveByte;

//write the result to destinationStream
destinationStream.Write(waveBuffer, 0, bytesPerSample);
}
}

//copy the rest of the wave without changes
//...
}
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Extracting the Message
public void Extract(Stream messageStream, Stream keyStream){

byte[] waveBuffer = new byte;
byte message, bit, waveByte;
int messageLength = 0; //expected length of the message
int keyByte; //distance of the next carrier sample

while( (messageLength==0 || messageStream.Length<messageLength) ){
//clear the message-byte
message = 0;

//for each bit in [message]
for(int bitIndex=0; bitIndex<8; bitIndex++){

//read a byte from the key
keyByte = GetKeyValue(keyStream);

//skip a couple of samples
for(int n=0; n<keyByte; n++){
//read one sample from the wave stream
sourceStream.Read(waveBuffer, 0, waveBuffer.Length);
}
waveByte = waveBuffer;

//get the last bit of the sample...
bit = (byte)(((waveByte % 2) == 0) ? 0 : 1);

//...write it into the message-byte
message += (byte)(bit << bitIndex);
}

//add the re-constructed byte to the message
messageStream.WriteByte(message);

if(messageLength==0 && messageStream.Length==4){
//first 4 bytes contain the message's length
//...
}
}
}
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