How do I save a stream to a file in C#?

Question

I have a StreamReader object that I initialized with a stream, now I want to save this stream to disk (the stream may be a .gif or .jpg

Answer 1

//If you don't have .Net 4.0  :)

public void SaveStreamToFile(Stream stream, string filename)
{  
   using(Stream destination = File.Create(filename))
      Write(stream, destination);
}

//Typically I implement this Write method as a Stream extension method. 
//The framework handles buffering.

public void Write(Stream from, Stream to)
{
   for(int a = from.ReadByte(); a != -1; a = from.ReadByte())
      to.WriteByte( (byte) a );
}

/*
Note, StreamReader is an IEnumerable while Stream is an IEnumbable.
The distinction is significant such as in multiple byte character encodings 
like Unicode used in .Net where Char is one or more bytes (byte[n]). Also, the
resulting translation from IEnumerable to IEnumerable can loose bytes
or insert them (for example, "\n" vs. "\r\n") depending on the StreamReader instance
CurrentEncoding.
*/