System.Net.Http.WinHttpHandler.WinHttpHandler.SetRequestHandleDecompressionOptions C# (CSharp) Method

        private void SetRequestHandleDecompressionOptions(SafeWinHttpHandle requestHandle)
        {
            uint optionData = 0;

            if (_automaticDecompression != DecompressionMethods.None)
            {
                if ((_automaticDecompression & DecompressionMethods.GZip) != 0)
                {
                    optionData |= Interop.WinHttp.WINHTTP_DECOMPRESSION_FLAG_GZIP;
                }

                if ((_automaticDecompression & DecompressionMethods.Deflate) != 0)
                {
                    optionData |= Interop.WinHttp.WINHTTP_DECOMPRESSION_FLAG_DEFLATE;
                }

                try
                {
                    SetWinHttpOption(requestHandle, Interop.WinHttp.WINHTTP_OPTION_DECOMPRESSION, ref optionData);
                }
                catch (WinHttpException ex)
                {
                    if (ex.NativeErrorCode != (int)Interop.WinHttp.ERROR_WINHTTP_INVALID_OPTION)
                    {
                        throw;
                    }

                    // We are running on a platform earlier than Win8.1 for which WINHTTP.DLL
                    // doesn't support this option.  So, we'll have to do the decompression
                    // manually.
                    _doManualDecompressionCheck = true;
                }
            }
        }