public static void WriteHandshakeFrame(this ConnectionStates.ConnectionState state, int contentSize, BufferExtensions.ContentWriter content, HandshakeType handshakeType)
{
var writer = new WriterWrapper(state.Connection.HandshakeOutput.Writer.Alloc(), state.HandshakeHash);
writer.WriteBigEndian(handshakeType);
writer.WriteBigEndian((UInt24)contentSize);
content(ref writer);
Debug.Assert((writer.BytesWritten - 4) == contentSize);
writer.Commit();
}