Conversion between c sharp Stream and byte[]

/*   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -  
  *   Stream   and   byte[]   conversion
  *   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   */
///   < summary >
///   converts   Stream   to   byte[]
///   < /summary >
public   byte[]   StreamToBytes(Stream   stream)
{
        byte[]   bytes   =   new   byte[stream.Length];
        stream.Read(bytes,   0,   bytes.Length);

        //   sets the position of the current stream to
at the beginning of the stream         stream.Seek(0,   SeekOrigin.Begin);
        return   bytes;
}

///   < summary >
///   converts   byte[]   to   Stream
///   < /summary >
public   Stream   BytesToStream(byte[]   bytes)
{
        Stream   stream   =   new   MemoryStream(bytes);
        return   stream;
}


/*   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -  
  *   Stream   and   files   *   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   */
///   < summary >
///   writes   Stream   to
///   < /summary >
public   void   StreamToFile(Stream   stream,string   fileName)
{
        //   convert   Stream   to   byte[]
        byte[]   bytes   =   new   byte[stream.Length];
        stream.Read(bytes,   0,   bytes.Length);
        //   sets the position of the current stream to the beginning of the stream
        stream.Seek(0,   SeekOrigin.Begin);

        //   write   byte[]   to
        FileStream   fs   =   new   FileStream(fileName,   FileMode.Create);
        BinaryWriter   bw   =   new   BinaryWriter(fs);
        bw.Write(bytes);
        bw.Close();
        fs.Close();
}

///   < summary >
///   reads   Stream
from the file ///   < /summary >
public   Stream   FileToStream(string   fileName)
{                        
        //   open
        FileStream   fileStream   =   new   FileStream(fileName,   FileMode.Open,   FileAccess.Read,   FileShare.Read);
        //   reads   byte[]
        byte[]   bytes   =   new   byte[fileStream.Length];
        fileStream.Read(bytes,   0,   bytes.Length);
        fileStream.Close();
        //   convert   byte[]   to   Stream
        Stream   stream   =   new   MemoryStream(bytes);
        return   stream;
}