IronRuby.Builtins.RubyBufferedStream.PushBack C# (CSharp) Method

        public void PushBack(byte b) {
            if (_bufferStart > 0) {
                _buffer[--_bufferStart] = b;
            } else if (_buffer != null) {
                Utils.InsertAt(ref _buffer, _bufferCount, 0, b, 1);
            } else {
                _buffer = new byte[_defaultBufferSize];
                _buffer[0] = b;
            }
            _pushedBackCount++;
            _bufferCount++;
        }