/// <summary>
/// Write data to the stream.
/// </summary>
///
/// <remarks>
/// <para>
/// If you wish to use the <c>GZipStream</c> to compress data while writing,
/// you can create a <c>GZipStream</c> with <c>CompressionMode.Compress</c>, and a
/// writable output stream. Then call <c>Write()</c> on that <c>GZipStream</c>,
/// providing uncompressed data as input. The data sent to the output stream
/// will be the compressed form of the data written.
/// </para>
///
/// <para>
/// A <c>GZipStream</c> can be used for <c>Read()</c> or <c>Write()</c>, but not
/// both. Writing implies compression. Reading implies decompression.
/// </para>
///
/// </remarks>
/// <param name="buffer">The buffer holding data to write to the stream.</param>
/// <param name="offset">the offset within that data array to find the first byte to write.</param>
/// <param name="count">the number of bytes to write.</param>
public override void Write(byte[] buffer, int offset, int count)
{
if (_disposed)
{
throw new ObjectDisposedException("GZipStream");
}
if (_baseStream._streamMode == ZlibBaseStream.StreamMode.Undefined)
{
//Console.WriteLine("GZipStream: First write");
if (_baseStream._wantCompress)
{
// first write in compression, therefore, emit the GZIP header
_headerByteCount = EmitHeader();
}
else
{
throw new InvalidOperationException();
}
}
_baseStream.Write(buffer, offset, count);
}