System.IO.BufferedStream.EnsureShadowBufferAllocated C# (CSharp) Méthode

        private void EnsureShadowBufferAllocated()
        {
            Debug.Assert(_buffer != null);
            Debug.Assert(_bufferSize > 0);

            // Already have a shadow buffer? 
            // Or is the user-specified buffer size already so large that we don't want to create one?
            if (_buffer.Length != _bufferSize || _bufferSize >= MaxShadowBufferSize)
                return;

            byte[] shadowBuffer = new byte[Math.Min(_bufferSize + _bufferSize, MaxShadowBufferSize)];
            Buffer.BlockCopy(_buffer, 0, shadowBuffer, 0, _writePos);
            _buffer = shadowBuffer;
        }