System.Security.Cryptography.ToBase64Transform.TransformBlock C# (CSharp) Метод

        public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset)
        {
            ValidateTransformBlock(inputBuffer, inputOffset, inputCount);

            // For now, only convert 3 bytes to 4
            byte[] tempBytes = ConvertToBase64(inputBuffer, inputOffset, 3);

            Buffer.BlockCopy(tempBytes, 0, outputBuffer, outputOffset, tempBytes.Length);
            return tempBytes.Length;
        }

        public override void ExecuteResult(ControllerContext context)
        {
            var responsetOutStream = context.HttpContext.Response.OutputStream;
            var base64Transformer = new ToBase64Transform();
            var inputSize = base64Transformer.InputBlockSize;
            var outputSize = base64Transformer.OutputBlockSize;
            var outputBuffer = new byte[outputSize];
            var inputBuffer = new byte[inputSize];

            int eof = _stream.ReadByte(), bytesRead;

            inputBuffer[0] = (byte)eof;
            while ((bytesRead = _stream.Read(inputBuffer, 1, inputBuffer.Length - 1)) != 0)
            {
                if ((eof = _stream.ReadByte()) == -1)
                    break;

                base64Transformer.TransformBlock(inputBuffer, 0, bytesRead + 1, outputBuffer, 0);
                responsetOutStream.Write(outputBuffer, 0, outputBuffer.Length);

                inputBuffer[0] = (byte)eof;
            }

            bytesRead++;
            var finalBlock = base64Transformer.TransformFinalBlock(inputBuffer, 0, bytesRead);
            responsetOutStream.Write(finalBlock, 0, finalBlock.Length);
        }